diff --git a/NEWS b/NEWS
index 62e9abd072..b494cb7258 100644
--- a/NEWS
+++ b/NEWS
@@ -16,6 +16,9 @@ USE AT YOUR OWN RISK.  NOT RECOMMENDED FOR PRODUCTION USE!
 * Enforce valid "connection.uuid" by normalizing the string to lower
   case. This changes the UUID of existing profiles that had an invalid,
   non-normalized value.
+* API BREAK: D-Bus: remove long deprecated PropertiesChanged signal from D-Bus
+  API. They are replaced by standard PropertiesChanged signal on the
+  "org.freedesktop.DBus.Properties" interface.
 
 =============================================
 NetworkManager-1.30
diff --git a/introspection/org.freedesktop.NetworkManager.AccessPoint.xml b/introspection/org.freedesktop.NetworkManager.AccessPoint.xml
index 769ab7a935..6edb25ead2 100644
--- a/introspection/org.freedesktop.NetworkManager.AccessPoint.xml
+++ b/introspection/org.freedesktop.NetworkManager.AccessPoint.xml
@@ -95,14 +95,5 @@
     -->
     <property name="LastSeen" type="i" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.AgentManager.xml b/introspection/org.freedesktop.NetworkManager.AgentManager.xml
index e8df4872af..e5fbd100ec 100644
--- a/introspection/org.freedesktop.NetworkManager.AgentManager.xml
+++ b/introspection/org.freedesktop.NetworkManager.AgentManager.xml
@@ -38,5 +38,6 @@
         when they disconnect from D-Bus.
     -->
     <method name="Unregister"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Checkpoint.xml b/introspection/org.freedesktop.NetworkManager.Checkpoint.xml
index daab0c903b..1496ed4ea4 100644
--- a/introspection/org.freedesktop.NetworkManager.Checkpoint.xml
+++ b/introspection/org.freedesktop.NetworkManager.Checkpoint.xml
@@ -32,14 +32,5 @@
     -->
     <property name="RollbackTimeout" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Connection.Active.xml b/introspection/org.freedesktop.NetworkManager.Connection.Active.xml
index 3962cf88ee..54e1fd9445 100644
--- a/introspection/org.freedesktop.NetworkManager.Connection.Active.xml
+++ b/introspection/org.freedesktop.NetworkManager.Connection.Active.xml
@@ -169,14 +169,5 @@
     -->
     <property name="Master" type="o" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.DHCP4Config.xml b/introspection/org.freedesktop.NetworkManager.DHCP4Config.xml
index 2e0ae82e10..0da12d62d0 100644
--- a/introspection/org.freedesktop.NetworkManager.DHCP4Config.xml
+++ b/introspection/org.freedesktop.NetworkManager.DHCP4Config.xml
@@ -17,14 +17,5 @@
     -->
     <property name="Options" type="a{sv}" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.DHCP6Config.xml b/introspection/org.freedesktop.NetworkManager.DHCP6Config.xml
index 0f064c4c87..940cf4e463 100644
--- a/introspection/org.freedesktop.NetworkManager.DHCP6Config.xml
+++ b/introspection/org.freedesktop.NetworkManager.DHCP6Config.xml
@@ -16,15 +16,5 @@
         Configuration options returned by a DHCP server, if any.
     -->
     <property name="Options" type="a{sv}" access="read"/>
-
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Adsl.xml b/introspection/org.freedesktop.NetworkManager.Device.Adsl.xml
index 5bb18aae12..29701d7874 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Adsl.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Adsl.xml
@@ -7,16 +7,6 @@
   -->
   <interface name="org.freedesktop.NetworkManager.Device.Adsl">
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
-
     <!--
         Carrier:
 
@@ -26,5 +16,6 @@
         property on the "org.freedesktop.NetworkManager.Device" interface.
     -->
     <property name="Carrier" type="b" access="read"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Bluetooth.xml b/introspection/org.freedesktop.NetworkManager.Device.Bluetooth.xml
index 1f5e618975..5cd0eaaee1 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Bluetooth.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Bluetooth.xml
@@ -32,14 +32,5 @@
     -->
     <property name="BtCapabilities" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Bond.xml b/introspection/org.freedesktop.NetworkManager.Device.Bond.xml
index c7ccf38998..26611aae59 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Bond.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Bond.xml
@@ -35,14 +35,5 @@ n
     -->
     <property name="Slaves" type="ao" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Bridge.xml b/introspection/org.freedesktop.NetworkManager.Device.Bridge.xml
index 5a35f54dd1..379e702a47 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Bridge.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Bridge.xml
@@ -35,14 +35,5 @@ n
     -->
     <property name="Slaves" type="ao" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Dummy.xml b/introspection/org.freedesktop.NetworkManager.Device.Dummy.xml
index 2c5675e8ae..22c917e831 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Dummy.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Dummy.xml
@@ -16,14 +16,5 @@ n
     -->
     <property name="HwAddress" type="s" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Generic.xml b/introspection/org.freedesktop.NetworkManager.Device.Generic.xml
index b847018be4..792c460bab 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Generic.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Generic.xml
@@ -23,14 +23,5 @@ n
     -->
     <property name="TypeDescription" type="s" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.IPTunnel.xml b/introspection/org.freedesktop.NetworkManager.Device.IPTunnel.xml
index 7c464b9478..4d8a85bbc6 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.IPTunnel.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.IPTunnel.xml
@@ -95,14 +95,5 @@
     -->
     <property name="Flags" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Infiniband.xml b/introspection/org.freedesktop.NetworkManager.Device.Infiniband.xml
index 53f71486df..e931a95820 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Infiniband.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Infiniband.xml
@@ -27,14 +27,5 @@ n
     -->
     <property name="Carrier" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Lowpan.xml b/introspection/org.freedesktop.NetworkManager.Device.Lowpan.xml
index 3415f18510..3866946d32 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Lowpan.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Lowpan.xml
@@ -22,5 +22,6 @@
         The object path of the parent device.
     -->
     <property name="Parent" type="o" access="read"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Macsec.xml b/introspection/org.freedesktop.NetworkManager.Device.Macsec.xml
index 0f109c1d6c..6fd2cee54d 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Macsec.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Macsec.xml
@@ -105,14 +105,5 @@
     -->
     <property name="ReplayProtect" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Macvlan.xml b/introspection/org.freedesktop.NetworkManager.Device.Macvlan.xml
index 3370ab04d6..cd810a53ca 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Macvlan.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Macvlan.xml
@@ -35,14 +35,5 @@
     -->
     <property name="Tap" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Modem.xml b/introspection/org.freedesktop.NetworkManager.Device.Modem.xml
index fabe1a2ee0..b089bda2de 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Modem.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Modem.xml
@@ -58,15 +58,5 @@
     -->
     <property name="Apn" type="s" access="read" />
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-        <arg name="properties" type="a{sv}"/>
-    </signal>
-
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.OlpcMesh.xml b/introspection/org.freedesktop.NetworkManager.Device.OlpcMesh.xml
index 3ae7ea961d..040a6a5d86 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.OlpcMesh.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.OlpcMesh.xml
@@ -30,14 +30,5 @@
     -->
     <property name="ActiveChannel" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary containing the FIXME: check changed parameters.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.OvsBridge.xml b/introspection/org.freedesktop.NetworkManager.Device.OvsBridge.xml
index 402ee028b3..ff58bd9527 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.OvsBridge.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.OvsBridge.xml
@@ -17,14 +17,5 @@
     -->
     <property name="Slaves" type="ao" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.OvsInterface.xml b/introspection/org.freedesktop.NetworkManager.Device.OvsInterface.xml
index 9605a958b4..be64eb471c 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.OvsInterface.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.OvsInterface.xml
@@ -7,14 +7,5 @@
   -->
   <interface name="org.freedesktop.NetworkManager.Device.OvsInterface">
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.OvsPort.xml b/introspection/org.freedesktop.NetworkManager.Device.OvsPort.xml
index c2db70ffd1..b43080378e 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.OvsPort.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.OvsPort.xml
@@ -17,14 +17,5 @@
     -->
     <property name="Slaves" type="ao" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Ppp.xml b/introspection/org.freedesktop.NetworkManager.Device.Ppp.xml
index 00605f7219..0032692e68 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Ppp.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Ppp.xml
@@ -7,14 +7,5 @@
   -->
   <interface name="org.freedesktop.NetworkManager.Device.Ppp">
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Statistics.xml b/introspection/org.freedesktop.NetworkManager.Device.Statistics.xml
index 39230b7fd0..06781692b4 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Statistics.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Statistics.xml
@@ -31,14 +31,5 @@
     -->
     <property name="RxBytes" type="t" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-        <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Team.xml b/introspection/org.freedesktop.NetworkManager.Device.Team.xml
index 0a4c72122d..bbae316b1d 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Team.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Team.xml
@@ -42,14 +42,5 @@ n
      -->
     <property name="Config" type="s" access="read" />
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Tun.xml b/introspection/org.freedesktop.NetworkManager.Device.Tun.xml
index 97bf5848cd..55a9bacb8d 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Tun.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Tun.xml
@@ -61,14 +61,5 @@ n
     -->
     <property name="HwAddress" type="s" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Veth.xml b/introspection/org.freedesktop.NetworkManager.Device.Veth.xml
index a5265e074e..900554c428 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Veth.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Veth.xml
@@ -14,14 +14,5 @@
     -->
     <property name="Peer" type="o" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Vlan.xml b/introspection/org.freedesktop.NetworkManager.Device.Vlan.xml
index b63194ec66..1ab762b2b7 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Vlan.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Vlan.xml
@@ -41,14 +41,5 @@ n
     -->
     <property name="VlanId" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Vrf.xml b/introspection/org.freedesktop.NetworkManager.Device.Vrf.xml
index 971d2b619d..9dfb6c8740 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Vrf.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Vrf.xml
@@ -13,5 +13,6 @@
         The routing table of the VRF.
     -->
     <property name="Table" type="u" access="read"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Vxlan.xml b/introspection/org.freedesktop.NetworkManager.Device.Vxlan.xml
index 035ca09b94..4c04f9dfb6 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Vxlan.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Vxlan.xml
@@ -135,14 +135,5 @@ n
     -->
     <property name="L3miss" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.WiMax.xml b/introspection/org.freedesktop.NetworkManager.Device.WiMax.xml
index 532b696432..e510a142db 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.WiMax.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.WiMax.xml
@@ -85,16 +85,6 @@
     -->
     <property name="ActiveNsp" type="o" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-        <arg name="properties" type="a{sv}"/>
-        </signal>
-
     <!--
         NspAdded:
         @nsp: The object path of the newly found NSP.
@@ -114,5 +104,6 @@
     <signal name="NspRemoved">
       <arg name="nsp" type="o"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.WireGuard.xml b/introspection/org.freedesktop.NetworkManager.Device.WireGuard.xml
index 8a18d9bd6e..b4d4698751 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.WireGuard.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.WireGuard.xml
@@ -33,5 +33,6 @@
         See: ip-rule(8)
     -->
     <property name="FwMark" type="u" access="read"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Wired.xml b/introspection/org.freedesktop.NetworkManager.Device.Wired.xml
index c501091951..ec3aeae37e 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Wired.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Wired.xml
@@ -49,14 +49,5 @@
     -->
     <property name="Carrier" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.Wireless.xml b/introspection/org.freedesktop.NetworkManager.Device.Wireless.xml
index c043a2c2f7..c57e568988 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.Wireless.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.Wireless.xml
@@ -108,16 +108,6 @@
     -->
     <property name="LastScan" type="x" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary containing the changed parameters.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-        <arg name="properties" type="a{sv}"/>
-        </signal>
-
     <!--
         AccessPointAdded:
         @access_point: The object path of the newly found access point.
@@ -126,7 +116,7 @@
     -->
     <signal name="AccessPointAdded">
         <arg name="access_point" type="o"/>
-        </signal>
+    </signal>
 
     <!--
         AccessPointRemoved:
@@ -137,5 +127,6 @@
     <signal name="AccessPointRemoved">
       <arg name="access_point" type="o"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Device.xml b/introspection/org.freedesktop.NetworkManager.Device.xml
index adcdaec163..32945bcb38 100644
--- a/introspection/org.freedesktop.NetworkManager.Device.xml
+++ b/introspection/org.freedesktop.NetworkManager.Device.xml
@@ -391,5 +391,6 @@
       <arg name="old_state" type="u"/>
       <arg name="reason" type="u"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.IP4Config.xml b/introspection/org.freedesktop.NetworkManager.IP4Config.xml
index 8ee29c3e08..ce659d71fd 100644
--- a/introspection/org.freedesktop.NetworkManager.IP4Config.xml
+++ b/introspection/org.freedesktop.NetworkManager.IP4Config.xml
@@ -115,14 +115,5 @@
     -->
     <property name="WinsServerData" type="as" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.IP6Config.xml b/introspection/org.freedesktop.NetworkManager.IP6Config.xml
index d2859b5af5..3fe4a46836 100644
--- a/introspection/org.freedesktop.NetworkManager.IP6Config.xml
+++ b/introspection/org.freedesktop.NetworkManager.IP6Config.xml
@@ -88,14 +88,5 @@
     -->
     <property name="DnsPriority" type="i" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.SecretAgent.xml b/introspection/org.freedesktop.NetworkManager.SecretAgent.xml
index 654b3f2f05..7c96064bc6 100644
--- a/introspection/org.freedesktop.NetworkManager.SecretAgent.xml
+++ b/introspection/org.freedesktop.NetworkManager.SecretAgent.xml
@@ -89,5 +89,6 @@
       <arg name="connection" type="a{sa{sv}}" direction="in"/>
       <arg name="connection_path" type="o" direction="in"/>
     </method>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Settings.Connection.xml b/introspection/org.freedesktop.NetworkManager.Settings.Connection.xml
index 40829e252d..55bdaff669 100644
--- a/introspection/org.freedesktop.NetworkManager.Settings.Connection.xml
+++ b/introspection/org.freedesktop.NetworkManager.Settings.Connection.xml
@@ -186,14 +186,5 @@
     -->
     <property name="Filename" type="s" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.Settings.xml b/introspection/org.freedesktop.NetworkManager.Settings.xml
index 1544e5529b..28c89ff4f7 100644
--- a/introspection/org.freedesktop.NetworkManager.Settings.xml
+++ b/introspection/org.freedesktop.NetworkManager.Settings.xml
@@ -159,16 +159,6 @@
     -->
     <property name="CanModify" type="b" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-        <arg name="properties" type="a{sv}"/>
-    </signal>
-
     <!--
         NewConnection:
         @connection: Object path of the new connection.
@@ -199,5 +189,6 @@
     <signal name="ConnectionRemoved">
       <arg name="connection" type="o"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.VPN.Connection.xml b/introspection/org.freedesktop.NetworkManager.VPN.Connection.xml
index 1dc1cc435c..92de149664 100644
--- a/introspection/org.freedesktop.NetworkManager.VPN.Connection.xml
+++ b/introspection/org.freedesktop.NetworkManager.VPN.Connection.xml
@@ -10,16 +10,6 @@
   <interface name="org.freedesktop.NetworkManager.VPN.Connection">
     <annotation name="org.gtk.GDBus.C.Name" value="VpnConnection"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
-
     <!--
         VpnState:
 
@@ -47,5 +37,6 @@
       <arg name="state" type="u"/>
       <arg name="reason" type="u"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.VPN.Plugin.xml b/introspection/org.freedesktop.NetworkManager.VPN.Plugin.xml
index 0c68f76e28..4c8a8af8c2 100644
--- a/introspection/org.freedesktop.NetworkManager.VPN.Plugin.xml
+++ b/introspection/org.freedesktop.NetworkManager.VPN.Plugin.xml
@@ -199,5 +199,6 @@
     <signal name="Failure">
       <arg name="reason" type="u"/>
     </signal>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.WiMax.Nsp.xml b/introspection/org.freedesktop.NetworkManager.WiMax.Nsp.xml
index cc074808f4..6ebf9cb70c 100644
--- a/introspection/org.freedesktop.NetworkManager.WiMax.Nsp.xml
+++ b/introspection/org.freedesktop.NetworkManager.WiMax.Nsp.xml
@@ -31,14 +31,5 @@
     -->
     <property name="NetworkType" type="u" access="read"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: A dictionary mapping property names to variant boxed values.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.WifiP2PPeer.xml b/introspection/org.freedesktop.NetworkManager.WifiP2PPeer.xml
index 9bbba3b834..760849c3f0 100644
--- a/introspection/org.freedesktop.NetworkManager.WifiP2PPeer.xml
+++ b/introspection/org.freedesktop.NetworkManager.WifiP2PPeer.xml
@@ -107,5 +107,6 @@
         Since: 1.16
     -->
     <property name="LastSeen" type="i" access="read"/>
+
   </interface>
 </node>
diff --git a/introspection/org.freedesktop.NetworkManager.xml b/introspection/org.freedesktop.NetworkManager.xml
index 2bcb156eec..ff74c5122d 100644
--- a/introspection/org.freedesktop.NetworkManager.xml
+++ b/introspection/org.freedesktop.NetworkManager.xml
@@ -549,16 +549,6 @@
     -->
     <property name="GlobalDnsConfiguration" type="a{sv}" access="readwrite"/>
 
-    <!--
-        PropertiesChanged:
-        @properties: The changed properties.
-
-        DEPRECATED. Use the standard "PropertiesChanged" signal from "org.freedesktop.DBus.Properties" instead which exists since version NetworkManager 1.2.0.
-    -->
-    <signal name="PropertiesChanged">
-      <arg name="properties" type="a{sv}"/>
-    </signal>
-
     <!--
         DeviceAdded:
         @device_path: The object path of the newly added device.
@@ -578,5 +568,6 @@
     <signal name="DeviceRemoved">
       <arg name="device_path" type="o"/>
     </signal>
+
   </interface>
 </node>
diff --git a/src/core/devices/adsl/nm-device-adsl.c b/src/core/devices/adsl/nm-device-adsl.c
index dcc1e0e469..4e4c9dcc9c 100644
--- a/src/core/devices/adsl/nm-device-adsl.c
+++ b/src/core/devices/adsl/nm-device-adsl.c
@@ -674,12 +674,8 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_adsl = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_ADSL,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier",
-                                                             "b",
-                                                             NM_DEVICE_CARRIER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER), ), ),
 };
 
 static void
diff --git a/src/core/devices/bluetooth/nm-device-bt.c b/src/core/devices/bluetooth/nm-device-bt.c
index c7f76a5ab8..8f4ceba75e 100644
--- a/src/core/devices/bluetooth/nm-device-bt.c
+++ b/src/core/devices/bluetooth/nm-device-bt.c
@@ -1317,16 +1317,12 @@ finalize(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_bluetooth = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_BLUETOOTH,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Name", "s", NM_DEVICE_BT_NAME),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("BtCapabilities",
-                                                             "u",
-                                                             NM_DEVICE_BT_CAPABILITIES), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Name", "s", NM_DEVICE_BT_NAME),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("BtCapabilities",
+                                                           "u",
+                                                           NM_DEVICE_BT_CAPABILITIES), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-bond.c b/src/core/devices/nm-device-bond.c
index 29d3abb42a..3b3b8fcdd3 100644
--- a/src/core/devices/nm-device-bond.c
+++ b/src/core/devices/nm-device-bond.c
@@ -601,16 +601,10 @@ nm_device_bond_init(NMDeviceBond *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_bond = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_BOND,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier", "b", NM_DEVICE_CARRIER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Slaves",
-                                                             "ao",
-                                                             NM_DEVICE_SLAVES), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-bridge.c b/src/core/devices/nm-device-bridge.c
index 8bed7839ae..a095dc3e96 100644
--- a/src/core/devices/nm-device-bridge.c
+++ b/src/core/devices/nm-device-bridge.c
@@ -1142,16 +1142,10 @@ nm_device_bridge_init(NMDeviceBridge *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_bridge = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_BRIDGE,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier", "b", NM_DEVICE_CARRIER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Slaves",
-                                                             "ao",
-                                                             NM_DEVICE_SLAVES), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-dummy.c b/src/core/devices/nm-device-dummy.c
index bb7150ccc7..488f0ba003 100644
--- a/src/core/devices/nm-device-dummy.c
+++ b/src/core/devices/nm-device-dummy.c
@@ -121,12 +121,10 @@ nm_device_dummy_init(NMDeviceDummy *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_dummy = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_DUMMY,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress",
+                                                           "s",
+                                                           NM_DEVICE_HW_ADDRESS), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-ethernet.c b/src/core/devices/nm-device-ethernet.c
index abe875334d..305552f074 100644
--- a/src/core/devices/nm-device-ethernet.c
+++ b/src/core/devices/nm-device-ethernet.c
@@ -2002,24 +2002,16 @@ set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *ps
 static const NMDBusInterfaceInfoExtended interface_info_device_wired = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_WIRED,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("PermHwAddress",
-                                                             "s",
-                                                             NM_DEVICE_PERM_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Speed",
-                                                             "u",
-                                                             NM_DEVICE_ETHERNET_SPEED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("S390Subchannels",
-                                                             "as",
-                                                             NM_DEVICE_ETHERNET_S390_SUBCHANNELS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier",
-                                                             "b",
-                                                             NM_DEVICE_CARRIER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PermHwAddress",
+                                                           "s",
+                                                           NM_DEVICE_PERM_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Speed", "u", NM_DEVICE_ETHERNET_SPEED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("S390Subchannels",
+                                                           "as",
+                                                           NM_DEVICE_ETHERNET_S390_SUBCHANNELS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-generic.c b/src/core/devices/nm-device-generic.c
index 299cb08d27..08ea5ac588 100644
--- a/src/core/devices/nm-device-generic.c
+++ b/src/core/devices/nm-device-generic.c
@@ -191,16 +191,12 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_generic = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_GENERIC,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE(
                 "TypeDescription",
                 "s",
                 NM_DEVICE_GENERIC_TYPE_DESCRIPTION), ), ),
-    .legacy_property_changed = TRUE,
 };
 
 static void
diff --git a/src/core/devices/nm-device-infiniband.c b/src/core/devices/nm-device-infiniband.c
index 954302507b..37065bc89f 100644
--- a/src/core/devices/nm-device-infiniband.c
+++ b/src/core/devices/nm-device-infiniband.c
@@ -366,15 +366,9 @@ nm_device_infiniband_init(NMDeviceInfiniband *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_infiniband = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_INFINIBAND,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier",
-                                                             "b",
-                                                             NM_DEVICE_CARRIER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-ip-tunnel.c b/src/core/devices/nm-device-ip-tunnel.c
index 1e7f134ae8..c55dd9f6b2 100644
--- a/src/core/devices/nm-device-ip-tunnel.c
+++ b/src/core/devices/nm-device-ip-tunnel.c
@@ -1050,39 +1050,33 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_ip_tunnel = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_IP_TUNNEL,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "u", NM_DEVICE_IP_TUNNEL_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Local",
-                                                             "s",
-                                                             NM_DEVICE_IP_TUNNEL_LOCAL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Remote",
-                                                             "s",
-                                                             NM_DEVICE_IP_TUNNEL_REMOTE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ttl", "y", NM_DEVICE_IP_TUNNEL_TTL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Tos", "y", NM_DEVICE_IP_TUNNEL_TOS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(
-                "PathMtuDiscovery",
-                "b",
-                NM_DEVICE_IP_TUNNEL_PATH_MTU_DISCOVERY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("InputKey",
-                                                             "s",
-                                                             NM_DEVICE_IP_TUNNEL_INPUT_KEY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("OutputKey",
-                                                             "s",
-                                                             NM_DEVICE_IP_TUNNEL_OUTPUT_KEY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(
-                "EncapsulationLimit",
-                "y",
-                NM_DEVICE_IP_TUNNEL_ENCAPSULATION_LIMIT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("FlowLabel",
-                                                             "u",
-                                                             NM_DEVICE_IP_TUNNEL_FLOW_LABEL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Flags",
-                                                             "u",
-                                                             NM_DEVICE_IP_TUNNEL_FLAGS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "u", NM_DEVICE_IP_TUNNEL_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Parent", "o", NM_DEVICE_PARENT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Local", "s", NM_DEVICE_IP_TUNNEL_LOCAL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Remote",
+                                                           "s",
+                                                           NM_DEVICE_IP_TUNNEL_REMOTE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ttl", "y", NM_DEVICE_IP_TUNNEL_TTL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Tos", "y", NM_DEVICE_IP_TUNNEL_TOS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PathMtuDiscovery",
+                                                           "b",
+                                                           NM_DEVICE_IP_TUNNEL_PATH_MTU_DISCOVERY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("InputKey",
+                                                           "s",
+                                                           NM_DEVICE_IP_TUNNEL_INPUT_KEY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("OutputKey",
+                                                           "s",
+                                                           NM_DEVICE_IP_TUNNEL_OUTPUT_KEY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("EncapsulationLimit",
+                                                           "y",
+                                                           NM_DEVICE_IP_TUNNEL_ENCAPSULATION_LIMIT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("FlowLabel",
+                                                           "u",
+                                                           NM_DEVICE_IP_TUNNEL_FLOW_LABEL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Flags",
+                                                           "u",
+                                                           NM_DEVICE_IP_TUNNEL_FLAGS), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-macsec.c b/src/core/devices/nm-device-macsec.c
index 14844c4085..51b7225bbf 100644
--- a/src/core/devices/nm-device-macsec.c
+++ b/src/core/devices/nm-device-macsec.c
@@ -870,40 +870,36 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_macsec = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_MACSEC,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Sci", "t", NM_DEVICE_MACSEC_SCI),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("IcvLength",
-                                                             "y",
-                                                             NM_DEVICE_MACSEC_ICV_LENGTH),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("CipherSuite",
-                                                             "t",
-                                                             NM_DEVICE_MACSEC_CIPHER_SUITE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Window",
-                                                             "u",
-                                                             NM_DEVICE_MACSEC_WINDOW),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("EncodingSa",
-                                                             "y",
-                                                             NM_DEVICE_MACSEC_ENCODING_SA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Validation",
-                                                             "s",
-                                                             NM_DEVICE_MACSEC_VALIDATION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Encrypt",
-                                                             "b",
-                                                             NM_DEVICE_MACSEC_ENCRYPT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Protect",
-                                                             "b",
-                                                             NM_DEVICE_MACSEC_PROTECT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("IncludeSci",
-                                                             "b",
-                                                             NM_DEVICE_MACSEC_INCLUDE_SCI),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Es", "b", NM_DEVICE_MACSEC_ES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Scb", "b", NM_DEVICE_MACSEC_SCB),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ReplayProtect",
-                                                             "b",
-                                                             NM_DEVICE_MACSEC_REPLAY_PROTECT), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Parent", "o", NM_DEVICE_PARENT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Sci", "t", NM_DEVICE_MACSEC_SCI),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("IcvLength",
+                                                           "y",
+                                                           NM_DEVICE_MACSEC_ICV_LENGTH),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("CipherSuite",
+                                                           "t",
+                                                           NM_DEVICE_MACSEC_CIPHER_SUITE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Window", "u", NM_DEVICE_MACSEC_WINDOW),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("EncodingSa",
+                                                           "y",
+                                                           NM_DEVICE_MACSEC_ENCODING_SA),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Validation",
+                                                           "s",
+                                                           NM_DEVICE_MACSEC_VALIDATION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Encrypt",
+                                                           "b",
+                                                           NM_DEVICE_MACSEC_ENCRYPT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Protect",
+                                                           "b",
+                                                           NM_DEVICE_MACSEC_PROTECT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("IncludeSci",
+                                                           "b",
+                                                           NM_DEVICE_MACSEC_INCLUDE_SCI),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Es", "b", NM_DEVICE_MACSEC_ES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Scb", "b", NM_DEVICE_MACSEC_SCB),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ReplayProtect",
+                                                           "b",
+                                                           NM_DEVICE_MACSEC_REPLAY_PROTECT), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-macvlan.c b/src/core/devices/nm-device-macvlan.c
index b9903bc06d..7302ecdf2d 100644
--- a/src/core/devices/nm-device-macvlan.c
+++ b/src/core/devices/nm-device-macvlan.c
@@ -502,17 +502,13 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_macvlan = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_MACVLAN,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "s", NM_DEVICE_MACVLAN_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("NoPromisc",
-                                                             "b",
-                                                             NM_DEVICE_MACVLAN_NO_PROMISC),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Tab",
-                                                             "b",
-                                                             NM_DEVICE_MACVLAN_TAP), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Parent", "o", NM_DEVICE_PARENT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "s", NM_DEVICE_MACVLAN_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("NoPromisc",
+                                                           "b",
+                                                           NM_DEVICE_MACVLAN_NO_PROMISC),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Tab", "b", NM_DEVICE_MACVLAN_TAP), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-ppp.c b/src/core/devices/nm-device-ppp.c
index b642d0d7de..8df245bb0f 100644
--- a/src/core/devices/nm-device-ppp.c
+++ b/src/core/devices/nm-device-ppp.c
@@ -274,10 +274,7 @@ dispose(GObject *object)
 }
 
 static const NMDBusInterfaceInfoExtended interface_info_device_ppp = {
-    .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
-        NM_DBUS_INTERFACE_DEVICE_PPP,
-        .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ), ),
-    .legacy_property_changed = TRUE,
+    .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(NM_DBUS_INTERFACE_DEVICE_PPP, ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-tun.c b/src/core/devices/nm-device-tun.c
index 1b3348dcba..ebccddfcf8 100644
--- a/src/core/devices/nm-device-tun.c
+++ b/src/core/devices/nm-device-tun.c
@@ -444,22 +444,18 @@ nm_device_tun_init(NMDeviceTun *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_tun = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_TUN,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Owner", "x", NM_DEVICE_TUN_OWNER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Group", "x", NM_DEVICE_TUN_GROUP),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "s", NM_DEVICE_TUN_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("NoPi", "b", NM_DEVICE_TUN_NO_PI),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VnetHdr",
-                                                             "b",
-                                                             NM_DEVICE_TUN_VNET_HDR),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("MultiQueue",
-                                                             "b",
-                                                             NM_DEVICE_TUN_MULTI_QUEUE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Owner", "x", NM_DEVICE_TUN_OWNER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Group", "x", NM_DEVICE_TUN_GROUP),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "s", NM_DEVICE_TUN_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("NoPi", "b", NM_DEVICE_TUN_NO_PI),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("VnetHdr", "b", NM_DEVICE_TUN_VNET_HDR),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("MultiQueue",
+                                                           "b",
+                                                           NM_DEVICE_TUN_MULTI_QUEUE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress",
+                                                           "s",
+                                                           NM_DEVICE_HW_ADDRESS), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-veth.c b/src/core/devices/nm-device-veth.c
index b1737b5b7f..28831b75bc 100644
--- a/src/core/devices/nm-device-veth.c
+++ b/src/core/devices/nm-device-veth.c
@@ -161,12 +161,8 @@ get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
 static const NMDBusInterfaceInfoExtended interface_info_device_veth = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_VETH,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Peer",
-                                                             "o",
-                                                             NM_DEVICE_VETH_PEER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Peer", "o", NM_DEVICE_VETH_PEER), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-vlan.c b/src/core/devices/nm-device-vlan.c
index 3b426ef4c9..548245f80c 100644
--- a/src/core/devices/nm-device-vlan.c
+++ b/src/core/devices/nm-device-vlan.c
@@ -547,17 +547,11 @@ nm_device_vlan_init(NMDeviceVlan *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_vlan = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_VLAN,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier", "b", NM_DEVICE_CARRIER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VlanId",
-                                                             "u",
-                                                             NM_DEVICE_VLAN_ID), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Parent", "o", NM_DEVICE_PARENT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("VlanId", "u", NM_DEVICE_VLAN_ID), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device-vxlan.c b/src/core/devices/nm-device-vxlan.c
index 557b545cf1..f9dfad2a82 100644
--- a/src/core/devices/nm-device-vxlan.c
+++ b/src/core/devices/nm-device-vxlan.c
@@ -576,38 +576,34 @@ nm_device_vxlan_init(NMDeviceVxlan *self)
 static const NMDBusInterfaceInfoExtended interface_info_device_vxlan = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_VXLAN,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Id", "u", NM_DEVICE_VXLAN_ID),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Group", "s", NM_DEVICE_VXLAN_GROUP),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Local", "s", NM_DEVICE_VXLAN_LOCAL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Tos", "y", NM_DEVICE_VXLAN_TOS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ttl", "y", NM_DEVICE_VXLAN_TTL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Learning",
-                                                             "b",
-                                                             NM_DEVICE_VXLAN_LEARNING),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ageing", "u", NM_DEVICE_VXLAN_AGEING),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Limit", "u", NM_DEVICE_VXLAN_LIMIT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DstPort",
-                                                             "q",
-                                                             NM_DEVICE_VXLAN_DST_PORT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("SrcPortMin",
-                                                             "q",
-                                                             NM_DEVICE_VXLAN_SRC_PORT_MIN),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("SrcPortMax",
-                                                             "q",
-                                                             NM_DEVICE_VXLAN_SRC_PORT_MAX),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Proxy", "b", NM_DEVICE_VXLAN_PROXY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Rsc", "b", NM_DEVICE_VXLAN_RSC),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("L2miss", "b", NM_DEVICE_VXLAN_L2MISS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("L3miss",
-                                                             "b",
-                                                             NM_DEVICE_VXLAN_L3MISS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Parent", "o", NM_DEVICE_PARENT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Id", "u", NM_DEVICE_VXLAN_ID),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Group", "s", NM_DEVICE_VXLAN_GROUP),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Local", "s", NM_DEVICE_VXLAN_LOCAL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Tos", "y", NM_DEVICE_VXLAN_TOS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ttl", "y", NM_DEVICE_VXLAN_TTL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Learning",
+                                                           "b",
+                                                           NM_DEVICE_VXLAN_LEARNING),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ageing", "u", NM_DEVICE_VXLAN_AGEING),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Limit", "u", NM_DEVICE_VXLAN_LIMIT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DstPort",
+                                                           "q",
+                                                           NM_DEVICE_VXLAN_DST_PORT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("SrcPortMin",
+                                                           "q",
+                                                           NM_DEVICE_VXLAN_SRC_PORT_MIN),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("SrcPortMax",
+                                                           "q",
+                                                           NM_DEVICE_VXLAN_SRC_PORT_MAX),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Proxy", "b", NM_DEVICE_VXLAN_PROXY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Rsc", "b", NM_DEVICE_VXLAN_RSC),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("L2miss", "b", NM_DEVICE_VXLAN_L2MISS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("L3miss",
+                                                           "b",
+                                                           NM_DEVICE_VXLAN_L3MISS), ), ),
 };
 
 static void
diff --git a/src/core/devices/nm-device.c b/src/core/devices/nm-device.c
index ecb55ec30d..42c0d067f6 100644
--- a/src/core/devices/nm-device.c
+++ b/src/core/devices/nm-device.c
@@ -18485,75 +18485,69 @@ static const NMDBusInterfaceInfoExtended interface_info_device = {
                                                 .handle = impl_device_delete, ), ),
         .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_state_changed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Udi", "s", NM_DEVICE_UDI),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Path", "s", NM_DEVICE_PATH),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Interface", "s", NM_DEVICE_IFACE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("IpInterface",
-                                                             "s",
-                                                             NM_DEVICE_IP_IFACE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Driver", "s", NM_DEVICE_DRIVER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DriverVersion",
-                                                             "s",
-                                                             NM_DEVICE_DRIVER_VERSION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("FirmwareVersion",
-                                                             "s",
-                                                             NM_DEVICE_FIRMWARE_VERSION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Capabilities",
-                                                             "u",
-                                                             NM_DEVICE_CAPABILITIES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ip4Address",
-                                                             "u",
-                                                             NM_DEVICE_IP4_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("State", "u", NM_DEVICE_STATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("StateReason",
-                                                             "(uu)",
-                                                             NM_DEVICE_STATE_REASON),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ActiveConnection",
-                                                             "o",
-                                                             NM_DEVICE_ACTIVE_CONNECTION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ip4Config",
-                                                             "o",
-                                                             NM_DEVICE_IP4_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Dhcp4Config",
-                                                             "o",
-                                                             NM_DEVICE_DHCP4_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ip6Config",
-                                                             "o",
-                                                             NM_DEVICE_IP6_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Dhcp6Config",
-                                                             "o",
-                                                             NM_DEVICE_DHCP6_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L("Managed",
-                                                                 "b",
-                                                                 NM_DEVICE_MANAGED,
-                                                                 NM_AUTH_PERMISSION_NETWORK_CONTROL,
-                                                                 NM_AUDIT_OP_DEVICE_MANAGED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L("Autoconnect",
-                                                                 "b",
-                                                                 NM_DEVICE_AUTOCONNECT,
-                                                                 NM_AUTH_PERMISSION_NETWORK_CONTROL,
-                                                                 NM_AUDIT_OP_DEVICE_AUTOCONNECT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("FirmwareMissing",
-                                                             "b",
-                                                             NM_DEVICE_FIRMWARE_MISSING),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("NmPluginMissing",
-                                                             "b",
-                                                             NM_DEVICE_NM_PLUGIN_MISSING),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DeviceType",
-                                                             "u",
-                                                             NM_DEVICE_DEVICE_TYPE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("AvailableConnections",
-                                                             "ao",
-                                                             NM_DEVICE_AVAILABLE_CONNECTIONS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("PhysicalPortId",
-                                                             "s",
-                                                             NM_DEVICE_PHYSICAL_PORT_ID),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mtu", "u", NM_DEVICE_MTU),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Metered", "u", NM_DEVICE_METERED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("LldpNeighbors",
-                                                             "aa{sv}",
-                                                             NM_DEVICE_LLDP_NEIGHBORS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Real", "b", NM_DEVICE_REAL),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Udi", "s", NM_DEVICE_UDI),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Path", "s", NM_DEVICE_PATH),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Interface", "s", NM_DEVICE_IFACE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("IpInterface", "s", NM_DEVICE_IP_IFACE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Driver", "s", NM_DEVICE_DRIVER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DriverVersion",
+                                                           "s",
+                                                           NM_DEVICE_DRIVER_VERSION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("FirmwareVersion",
+                                                           "s",
+                                                           NM_DEVICE_FIRMWARE_VERSION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Capabilities",
+                                                           "u",
+                                                           NM_DEVICE_CAPABILITIES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip4Address",
+                                                           "u",
+                                                           NM_DEVICE_IP4_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("State", "u", NM_DEVICE_STATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("StateReason",
+                                                           "(uu)",
+                                                           NM_DEVICE_STATE_REASON),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ActiveConnection",
+                                                           "o",
+                                                           NM_DEVICE_ACTIVE_CONNECTION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip4Config", "o", NM_DEVICE_IP4_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Dhcp4Config",
+                                                           "o",
+                                                           NM_DEVICE_DHCP4_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip6Config", "o", NM_DEVICE_IP6_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Dhcp6Config",
+                                                           "o",
+                                                           NM_DEVICE_DHCP6_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE("Managed",
+                                                               "b",
+                                                               NM_DEVICE_MANAGED,
+                                                               NM_AUTH_PERMISSION_NETWORK_CONTROL,
+                                                               NM_AUDIT_OP_DEVICE_MANAGED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE("Autoconnect",
+                                                               "b",
+                                                               NM_DEVICE_AUTOCONNECT,
+                                                               NM_AUTH_PERMISSION_NETWORK_CONTROL,
+                                                               NM_AUDIT_OP_DEVICE_AUTOCONNECT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("FirmwareMissing",
+                                                           "b",
+                                                           NM_DEVICE_FIRMWARE_MISSING),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("NmPluginMissing",
+                                                           "b",
+                                                           NM_DEVICE_NM_PLUGIN_MISSING),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DeviceType",
+                                                           "u",
+                                                           NM_DEVICE_DEVICE_TYPE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("AvailableConnections",
+                                                           "ao",
+                                                           NM_DEVICE_AVAILABLE_CONNECTIONS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PhysicalPortId",
+                                                           "s",
+                                                           NM_DEVICE_PHYSICAL_PORT_ID),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mtu", "u", NM_DEVICE_MTU),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Metered", "u", NM_DEVICE_METERED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("LldpNeighbors",
+                                                           "aa{sv}",
+                                                           NM_DEVICE_LLDP_NEIGHBORS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Real", "b", NM_DEVICE_REAL),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip4Connectivity",
                                                            "u",
                                                            NM_DEVICE_IP4_CONNECTIVITY),
@@ -18568,10 +18562,9 @@ static const NMDBusInterfaceInfoExtended interface_info_device = {
                                                            NM_DEVICE_HW_ADDRESS), ), ),
 };
 
-const NMDBusInterfaceInfoExtended nm_interface_info_device_statistics = {
+static const NMDBusInterfaceInfoExtended interface_info_device_statistics = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_STATISTICS,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "RefreshRateMs",
@@ -18597,7 +18590,7 @@ nm_device_class_init(NMDeviceClass *klass)
 
     dbus_object_class->export_path = NM_DBUS_EXPORT_PATH_NUMBERED(NM_DBUS_PATH "/Devices");
     dbus_object_class->interface_infos =
-        NM_DBUS_INTERFACE_INFOS(&interface_info_device, &nm_interface_info_device_statistics);
+        NM_DBUS_INTERFACE_INFOS(&interface_info_device, &interface_info_device_statistics);
 
     object_class->dispose      = dispose;
     object_class->finalize     = finalize;
diff --git a/src/core/devices/ovs/nm-device-ovs-bridge.c b/src/core/devices/ovs/nm-device-ovs-bridge.c
index 37feb2f442..26a5ba002c 100644
--- a/src/core/devices/ovs/nm-device-ovs-bridge.c
+++ b/src/core/devices/ovs/nm-device-ovs-bridge.c
@@ -134,9 +134,7 @@ static const NMDBusInterfaceInfoExtended interface_info_device_ovs_bridge = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_OVS_BRIDGE,
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ),
-        .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ), ),
 };
 
 static void
diff --git a/src/core/devices/ovs/nm-device-ovs-interface.c b/src/core/devices/ovs/nm-device-ovs-interface.c
index 5d07c2117e..ec4de356be 100644
--- a/src/core/devices/ovs/nm-device-ovs-interface.c
+++ b/src/core/devices/ovs/nm-device-ovs-interface.c
@@ -405,10 +405,7 @@ dispose(GObject *object)
 }
 
 static const NMDBusInterfaceInfoExtended interface_info_device_ovs_interface = {
-    .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
-        NM_DBUS_INTERFACE_DEVICE_OVS_INTERFACE,
-        .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ), ),
-    .legacy_property_changed = TRUE,
+    .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(NM_DBUS_INTERFACE_DEVICE_OVS_INTERFACE, ),
 };
 
 static void
diff --git a/src/core/devices/ovs/nm-device-ovs-port.c b/src/core/devices/ovs/nm-device-ovs-port.c
index 2ecb95e881..f11c585235 100644
--- a/src/core/devices/ovs/nm-device-ovs-port.c
+++ b/src/core/devices/ovs/nm-device-ovs-port.c
@@ -167,9 +167,7 @@ static const NMDBusInterfaceInfoExtended interface_info_device_ovs_port = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_OVS_PORT,
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ),
-        .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES), ), ),
 };
 
 static void
diff --git a/src/core/devices/team/nm-device-team.c b/src/core/devices/team/nm-device-team.c
index efd71dcb60..9c78987aee 100644
--- a/src/core/devices/team/nm-device-team.c
+++ b/src/core/devices/team/nm-device-team.c
@@ -1042,17 +1042,13 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_team = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_TEAM,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier", "b", NM_DEVICE_CARRIER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Slaves", "ao", NM_DEVICE_SLAVES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Config",
-                                                             "s",
-                                                             NM_DEVICE_TEAM_CONFIG), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Carrier", "b", NM_DEVICE_CARRIER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Slaves", "ao", NM_DEVICE_SLAVES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Config",
+                                                           "s",
+                                                           NM_DEVICE_TEAM_CONFIG), ), ),
 };
 
 static void
diff --git a/src/core/devices/wifi/nm-device-olpc-mesh.c b/src/core/devices/wifi/nm-device-olpc-mesh.c
index 4ec8b077fb..3d977db26c 100644
--- a/src/core/devices/wifi/nm-device-olpc-mesh.c
+++ b/src/core/devices/wifi/nm-device-olpc-mesh.c
@@ -492,19 +492,15 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_olpc_mesh = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_OLPC_MESH,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Companion",
-                                                             "o",
-                                                             NM_DEVICE_OLPC_MESH_COMPANION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Companion",
+                                                           "o",
+                                                           NM_DEVICE_OLPC_MESH_COMPANION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE(
                 "ActiveChannel",
                 "u",
                 NM_DEVICE_OLPC_MESH_ACTIVE_CHANNEL), ), ),
-    .legacy_property_changed = TRUE,
 };
 
 static void
diff --git a/src/core/devices/wifi/nm-device-wifi-p2p.c b/src/core/devices/wifi/nm-device-wifi-p2p.c
index 7ff0434ca9..a8ea2ed7e5 100644
--- a/src/core/devices/wifi/nm-device-wifi-p2p.c
+++ b/src/core/devices/wifi/nm-device-wifi-p2p.c
@@ -1149,7 +1149,6 @@ static const NMDBusInterfaceInfoExtended interface_info_device_wifi_p2p = {
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Peers",
                                                            "ao",
                                                            NM_DEVICE_WIFI_P2P_PEERS), ), ),
-    .legacy_property_changed = FALSE,
 };
 
 /*****************************************************************************/
diff --git a/src/core/devices/wifi/nm-wifi-ap.c b/src/core/devices/wifi/nm-wifi-ap.c
index 62fe1f1f25..20ed6833ab 100644
--- a/src/core/devices/wifi/nm-wifi-ap.c
+++ b/src/core/devices/wifi/nm-wifi-ap.c
@@ -862,27 +862,21 @@ finalize(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_access_point = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_ACCESS_POINT,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Flags", "u", NM_WIFI_AP_FLAGS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WpaFlags", "u", NM_WIFI_AP_WPA_FLAGS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("RsnFlags", "u", NM_WIFI_AP_RSN_FLAGS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ssid", "ay", NM_WIFI_AP_SSID),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Frequency",
-                                                             "u",
-                                                             NM_WIFI_AP_FREQUENCY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_WIFI_AP_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "u", NM_WIFI_AP_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("MaxBitrate",
-                                                             "u",
-                                                             NM_WIFI_AP_MAX_BITRATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Strength", "y", NM_WIFI_AP_STRENGTH),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("LastSeen",
-                                                             "i",
-                                                             NM_WIFI_AP_LAST_SEEN), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Flags", "u", NM_WIFI_AP_FLAGS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WpaFlags", "u", NM_WIFI_AP_WPA_FLAGS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("RsnFlags", "u", NM_WIFI_AP_RSN_FLAGS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ssid", "ay", NM_WIFI_AP_SSID),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Frequency", "u", NM_WIFI_AP_FREQUENCY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_WIFI_AP_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "u", NM_WIFI_AP_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("MaxBitrate",
+                                                           "u",
+                                                           NM_WIFI_AP_MAX_BITRATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Strength", "y", NM_WIFI_AP_STRENGTH),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("LastSeen",
+                                                           "i",
+                                                           NM_WIFI_AP_LAST_SEEN), ), ),
 };
 
 static void
diff --git a/src/core/devices/wifi/nm-wifi-common.c b/src/core/devices/wifi/nm-wifi-common.c
index c715c07ce3..b98ef2227e 100644
--- a/src/core/devices/wifi/nm-wifi-common.c
+++ b/src/core/devices/wifi/nm-wifi-common.c
@@ -146,31 +146,25 @@ const NMDBusInterfaceInfoExtended nm_interface_info_device_wireless = {
                     .in_args = NM_DEFINE_GDBUS_ARG_INFOS(
                         NM_DEFINE_GDBUS_ARG_INFO("options", "a{sv}"), ), ),
                 .handle = impl_device_wifi_request_scan, ), ),
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &nm_signal_info_wireless_access_point_added,
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_wireless_access_point_added,
                                                 &nm_signal_info_wireless_access_point_removed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
-                                                             "s",
-                                                             NM_DEVICE_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("PermHwAddress",
-                                                             "s",
-                                                             NM_DEVICE_PERM_HW_ADDRESS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "u", NM_DEVICE_WIFI_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Bitrate",
-                                                             "u",
-                                                             NM_DEVICE_WIFI_BITRATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("AccessPoints",
-                                                             "ao",
-                                                             NM_DEVICE_WIFI_ACCESS_POINTS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ActiveAccessPoint",
-                                                             "o",
-                                                             NM_DEVICE_WIFI_ACTIVE_ACCESS_POINT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WirelessCapabilities",
-                                                             "u",
-                                                             NM_DEVICE_WIFI_CAPABILITIES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("HwAddress", "s", NM_DEVICE_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PermHwAddress",
+                                                           "s",
+                                                           NM_DEVICE_PERM_HW_ADDRESS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "u", NM_DEVICE_WIFI_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Bitrate", "u", NM_DEVICE_WIFI_BITRATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("AccessPoints",
+                                                           "ao",
+                                                           NM_DEVICE_WIFI_ACCESS_POINTS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ActiveAccessPoint",
+                                                           "o",
+                                                           NM_DEVICE_WIFI_ACTIVE_ACCESS_POINT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WirelessCapabilities",
+                                                           "u",
+                                                           NM_DEVICE_WIFI_CAPABILITIES),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("LastScan",
                                                            "x",
                                                            NM_DEVICE_WIFI_LAST_SCAN), ), ),
-    .legacy_property_changed = TRUE,
 };
diff --git a/src/core/devices/wifi/nm-wifi-p2p-peer.c b/src/core/devices/wifi/nm-wifi-p2p-peer.c
index 228a26bf16..433c283386 100644
--- a/src/core/devices/wifi/nm-wifi-p2p-peer.c
+++ b/src/core/devices/wifi/nm-wifi-p2p-peer.c
@@ -608,7 +608,6 @@ static const NMDBusInterfaceInfoExtended interface_info_p2p_peer = {
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("LastSeen",
                                                            "i",
                                                            NM_WIFI_P2P_PEER_LAST_SEEN), ), ),
-    .legacy_property_changed = FALSE,
 };
 
 static void
diff --git a/src/core/devices/wwan/nm-device-modem.c b/src/core/devices/wwan/nm-device-modem.c
index 405ced64a1..a8d2a161fc 100644
--- a/src/core/devices/wwan/nm-device-modem.c
+++ b/src/core/devices/wwan/nm-device-modem.c
@@ -855,14 +855,13 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_device_modem = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DEVICE_MODEM,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ModemCapabilities",
-                                                             "u",
-                                                             NM_DEVICE_MODEM_CAPABILITIES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("CurrentCapabilities",
-                                                             "u",
-                                                             NM_DEVICE_MODEM_CURRENT_CAPABILITIES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ModemCapabilities",
+                                                           "u",
+                                                           NM_DEVICE_MODEM_CAPABILITIES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("CurrentCapabilities",
+                                                           "u",
+                                                           NM_DEVICE_MODEM_CURRENT_CAPABILITIES),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DeviceId",
                                                            "s",
                                                            NM_DEVICE_MODEM_DEVICE_ID),
@@ -870,7 +869,6 @@ static const NMDBusInterfaceInfoExtended interface_info_device_modem = {
                                                            "s",
                                                            NM_DEVICE_MODEM_OPERATOR_CODE),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Apn", "s", NM_DEVICE_MODEM_APN), ), ),
-    .legacy_property_changed = TRUE,
 };
 
 static void
diff --git a/src/core/dns/nm-dns-manager.c b/src/core/dns/nm-dns-manager.c
index d1e2020b39..60a34b8eb9 100644
--- a/src/core/dns/nm-dns-manager.c
+++ b/src/core/dns/nm-dns-manager.c
@@ -2618,13 +2618,13 @@ static const NMDBusInterfaceInfoExtended interface_info_dns_manager = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DNS_MANAGER,
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "s", NM_DNS_MANAGER_MODE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("RcManager",
-                                                             "s",
-                                                             NM_DNS_MANAGER_RC_MANAGER),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Configuration",
-                                                             "aa{sv}",
-                                                             NM_DNS_MANAGER_CONFIGURATION), ), ),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Mode", "s", NM_DNS_MANAGER_MODE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("RcManager",
+                                                           "s",
+                                                           NM_DNS_MANAGER_RC_MANAGER),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Configuration",
+                                                           "aa{sv}",
+                                                           NM_DNS_MANAGER_CONFIGURATION), ), ),
 };
 
 static void
diff --git a/src/core/nm-active-connection.c b/src/core/nm-active-connection.c
index 832cf36e7e..bf2c4a39f1 100644
--- a/src/core/nm-active-connection.c
+++ b/src/core/nm-active-connection.c
@@ -1555,54 +1555,48 @@ static const GDBusSignalInfo signal_info_state_changed = NM_DEFINE_GDBUS_SIGNAL_
 static const NMDBusInterfaceInfoExtended interface_info_active_connection = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_ACTIVE_CONNECTION,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &signal_info_state_changed, ),
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_state_changed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Connection",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_CONNECTION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("SpecificObject",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_SPECIFIC_OBJECT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Id", "s", NM_ACTIVE_CONNECTION_ID),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Uuid",
-                                                             "s",
-                                                             NM_ACTIVE_CONNECTION_UUID),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Type",
-                                                             "s",
-                                                             NM_ACTIVE_CONNECTION_TYPE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Devices",
-                                                             "ao",
-                                                             NM_ACTIVE_CONNECTION_DEVICES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("State",
-                                                             "u",
-                                                             NM_ACTIVE_CONNECTION_STATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("StateFlags",
-                                                             "u",
-                                                             NM_ACTIVE_CONNECTION_STATE_FLAGS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Default",
-                                                             "b",
-                                                             NM_ACTIVE_CONNECTION_DEFAULT),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ip4Config",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_IP4_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Dhcp4Config",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_DHCP4_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Default6",
-                                                             "b",
-                                                             NM_ACTIVE_CONNECTION_DEFAULT6),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Ip6Config",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_IP6_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Dhcp6Config",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_DHCP6_CONFIG),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Vpn", "b", NM_ACTIVE_CONNECTION_VPN),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Master",
-                                                             "o",
-                                                             NM_ACTIVE_CONNECTION_MASTER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Connection",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_CONNECTION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("SpecificObject",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_SPECIFIC_OBJECT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Id", "s", NM_ACTIVE_CONNECTION_ID),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Uuid", "s", NM_ACTIVE_CONNECTION_UUID),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Type", "s", NM_ACTIVE_CONNECTION_TYPE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Devices",
+                                                           "ao",
+                                                           NM_ACTIVE_CONNECTION_DEVICES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("State",
+                                                           "u",
+                                                           NM_ACTIVE_CONNECTION_STATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("StateFlags",
+                                                           "u",
+                                                           NM_ACTIVE_CONNECTION_STATE_FLAGS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Default",
+                                                           "b",
+                                                           NM_ACTIVE_CONNECTION_DEFAULT),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip4Config",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_IP4_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Dhcp4Config",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_DHCP4_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Default6",
+                                                           "b",
+                                                           NM_ACTIVE_CONNECTION_DEFAULT6),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Ip6Config",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_IP6_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Dhcp6Config",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_DHCP6_CONFIG),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Vpn", "b", NM_ACTIVE_CONNECTION_VPN),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Master",
+                                                           "o",
+                                                           NM_ACTIVE_CONNECTION_MASTER), ), ),
 };
 
 static void
diff --git a/src/core/nm-checkpoint.c b/src/core/nm-checkpoint.c
index 76210abc0e..164f4a868b 100644
--- a/src/core/nm-checkpoint.c
+++ b/src/core/nm-checkpoint.c
@@ -739,16 +739,12 @@ dispose(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_checkpoint = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_CHECKPOINT,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Devices",
-                                                             "ao",
-                                                             NM_CHECKPOINT_DEVICES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Created", "x", NM_CHECKPOINT_CREATED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("RollbackTimeout",
-                                                             "u",
-                                                             NM_CHECKPOINT_ROLLBACK_TIMEOUT), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Devices", "ao", NM_CHECKPOINT_DEVICES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Created", "x", NM_CHECKPOINT_CREATED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("RollbackTimeout",
+                                                           "u",
+                                                           NM_CHECKPOINT_ROLLBACK_TIMEOUT), ), ),
 };
 
 static void
diff --git a/src/core/nm-dbus-manager.c b/src/core/nm-dbus-manager.c
index 95e403ae4d..c47d4dbfaf 100644
--- a/src/core/nm-dbus-manager.c
+++ b/src/core/nm-dbus-manager.c
@@ -1139,10 +1139,6 @@ _nm_dbus_manager_obj_notify(NMDBusObject *obj, guint n_pspecs, const GParamSpec
     NMDBusManagerPrivate *priv;
     RegistrationData *    reg_data;
     guint                 i, p;
-    gboolean              any_legacy_signals    = FALSE;
-    gboolean              any_legacy_properties = FALSE;
-    GVariantBuilder       legacy_builder;
-    GVariant *            device_statistics_args = NULL;
 
     nm_assert(NM_IS_DBUS_OBJECT(obj));
     nm_assert(obj->internal.path);
@@ -1159,13 +1155,6 @@ _nm_dbus_manager_obj_notify(NMDBusObject *obj, guint n_pspecs, const GParamSpec
     if (G_UNLIKELY(!priv->started))
         return;
 
-    c_list_for_each_entry (reg_data, &obj->internal.registration_lst_head, registration_lst) {
-        if (_reg_data_get_interface_info(reg_data)->legacy_property_changed) {
-            any_legacy_signals = TRUE;
-            break;
-        }
-    }
-
     /* do a naive search for the matching NMDBusPropertyInfoExtended infos. Since the number of
      * (interfaces x properties) is static and possibly small, this naive search is effectively
      * O(1). We might wanna introduce some index to lookup the properties in question faster.
@@ -1196,18 +1185,6 @@ _nm_dbus_manager_obj_notify(NMDBusObject *obj, guint n_pspecs, const GParamSpec
 
                 value = _obj_get_property(reg_data, i, TRUE);
 
-                if (property_info->include_in_legacy_property_changed && any_legacy_signals) {
-                    /* also track the value in the legacy_builder to emit legacy signals below. */
-                    if (!any_legacy_properties) {
-                        any_legacy_properties = TRUE;
-                        g_variant_builder_init(&legacy_builder, G_VARIANT_TYPE("a{sv}"));
-                    }
-                    g_variant_builder_add(&legacy_builder,
-                                          "{sv}",
-                                          property_info->parent.name,
-                                          value);
-                }
-
                 if (!has_properties) {
                     has_properties = TRUE;
                     g_variant_builder_init(&builder, G_VARIANT_TYPE("a{sv}"));
@@ -1221,13 +1198,6 @@ _nm_dbus_manager_obj_notify(NMDBusObject *obj, guint n_pspecs, const GParamSpec
 
         args = g_variant_builder_end(&builder);
 
-        if (G_UNLIKELY(interface_info == &nm_interface_info_device_statistics)) {
-            /* we treat the Device.Statistics signal special, because we need to
-             * emit a signal also for it (below). */
-            nm_assert(!device_statistics_args);
-            device_statistics_args = g_variant_ref_sink(args);
-        }
-
         g_variant_builder_init(&invalidated_builder, G_VARIANT_TYPE("as"));
         g_dbus_connection_emit_signal(
             priv->main_dbus_connection,
@@ -1238,57 +1208,6 @@ _nm_dbus_manager_obj_notify(NMDBusObject *obj, guint n_pspecs, const GParamSpec
             g_variant_new("(s@a{sv}as)", interface_info->parent.name, args, &invalidated_builder),
             NULL);
     }
-
-    if (G_UNLIKELY(device_statistics_args)) {
-        /* this is a special interface: it has a legacy PropertiesChanged signal,
-         * however, contrary to other interfaces with ~regular~ legacy signals,
-         * we only notify about properties that actually belong to this interface. */
-        g_dbus_connection_emit_signal(priv->main_dbus_connection,
-                                      NULL,
-                                      obj->internal.path,
-                                      nm_interface_info_device_statistics.parent.name,
-                                      "PropertiesChanged",
-                                      g_variant_new("(@a{sv})", device_statistics_args),
-                                      NULL);
-        g_variant_unref(device_statistics_args);
-    }
-
-    if (any_legacy_properties) {
-        gs_unref_variant GVariant *args = NULL;
-
-        /* The legacy PropertyChanged signal on the NetworkManager D-Bus interface is
-         * deprecated for the standard signal on org.freedesktop.DBus.Properties. However,
-         * for backward compatibility, we still need to emit it.
-         *
-         * Due to a bug in dbus-glib in NetworkManager <= 1.0, the signal would
-         * not only notify about properties that were actually on the corresponding
-         * D-Bus interface. Instead, it would notify about all relevant properties
-         * on all interfaces that had such a signal.
-         *
-         * For example, "HwAddress" gets emitted both on "fdo.NM.Device.Ethernet"
-         * and "fdo.NM.Device.Veth" for veth interfaces, although only the former
-         * actually has such a property.
-         * Also note that "fdo.NM.Device" interface has no legacy signal. All notifications
-         * about its properties are instead emitted on the interfaces of the subtypes.
-         *
-         * See bgo#770629 and commit bef26a2e69f51259095fa080221db73de09fd38d.
-         */
-        args = g_variant_ref_sink(g_variant_new("(a{sv})", &legacy_builder));
-        c_list_for_each_entry (reg_data, &obj->internal.registration_lst_head, registration_lst) {
-            const NMDBusInterfaceInfoExtended *interface_info =
-                _reg_data_get_interface_info(reg_data);
-
-            if (interface_info->legacy_property_changed) {
-                g_dbus_connection_emit_signal(priv->main_dbus_connection,
-                                              NULL,
-                                              obj->internal.path,
-                                              interface_info->parent.name,
-                                              "PropertiesChanged",
-                                              args,
-                                              NULL);
-            }
-        }
-    }
 }
 
 void
diff --git a/src/core/nm-dbus-object.h b/src/core/nm-dbus-object.h
index c7c1b4f445..ae089dd30f 100644
--- a/src/core/nm-dbus-object.h
+++ b/src/core/nm-dbus-object.h
@@ -45,17 +45,6 @@ typedef struct {
 
 /*****************************************************************************/
 
-/* "org.freedesktop.NetworkManager.Device.Statistics" is a special interface,
- * because although it has a legacy PropertiesChanged signal, it only notifies
- * about properties that actually exist on that interface. That is, because it
- * was added with 1.4.0 release, and thus didn't have the broken behavior like
- * other legacy interfaces. Those notify about *all* properties, even if they
- * are not part of that D-Bus interface. See also "include_in_legacy_property_changed"
- * and "legacy_property_changed". */
-extern const NMDBusInterfaceInfoExtended nm_interface_info_device_statistics;
-
-/*****************************************************************************/
-
 #define NM_TYPE_DBUS_OBJECT (nm_dbus_object_get_type())
 #define NM_DBUS_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), NM_TYPE_DBUS_OBJECT, NMDBusObject))
 #define NM_DBUS_OBJECT_CLASS(klass) \
diff --git a/src/core/nm-dbus-utils.c b/src/core/nm-dbus-utils.c
index 5890bdf29f..d3e5612d32 100644
--- a/src/core/nm-dbus-utils.c
+++ b/src/core/nm-dbus-utils.c
@@ -11,10 +11,6 @@
 
 /*****************************************************************************/
 
-const GDBusSignalInfo nm_signal_info_property_changed_legacy = NM_DEFINE_GDBUS_SIGNAL_INFO_INIT(
-    "PropertiesChanged",
-    .args = NM_DEFINE_GDBUS_ARG_INFOS(NM_DEFINE_GDBUS_ARG_INFO("properties", "a{sv}"), ), );
-
 GDBusPropertyInfo *
 nm_dbus_utils_interface_info_lookup_property(const GDBusInterfaceInfo *interface_info,
                                              const char *              property_name,
diff --git a/src/core/nm-dbus-utils.h b/src/core/nm-dbus-utils.h
index 501e199618..6585d43d76 100644
--- a/src/core/nm-dbus-utils.h
+++ b/src/core/nm-dbus-utils.h
@@ -14,11 +14,6 @@ struct _NMDBusMethodInfoExtended;
 struct _NMDBusPropertyInfoExtendedBase {
     GDBusPropertyInfo _parent;
     const char *      property_name;
-
-    /* Whether the properties needs to be notified on the legacy
-     * PropertyChanged signal. This is only to preserve API, new
-     * properties should not use this. */
-    bool include_in_legacy_property_changed;
 };
 
 struct _NMDBusPropertyInfoExtendedReadWritable {
@@ -43,93 +38,46 @@ typedef struct {
         struct {
             GDBusPropertyInfo parent;
             const char *      property_name;
-
-            /* Whether the properties needs to be notified on the legacy
-             * PropertyChanged signal. This is only to preserve API, new
-             * properties should not use this. */
-            bool include_in_legacy_property_changed;
         };
     };
 } NMDBusPropertyInfoExtended;
 
 G_STATIC_ASSERT(G_STRUCT_OFFSET(NMDBusPropertyInfoExtended, property_name)
                 == G_STRUCT_OFFSET(struct _NMDBusPropertyInfoExtendedBase, property_name));
-G_STATIC_ASSERT(G_STRUCT_OFFSET(NMDBusPropertyInfoExtended, include_in_legacy_property_changed)
-                == G_STRUCT_OFFSET(struct _NMDBusPropertyInfoExtendedBase,
-                                   include_in_legacy_property_changed));
-
-#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_FULL(m_name,                               \
-                                                            m_signature,                          \
-                                                            m_property_name,                      \
-                                                            m_include_in_legacy_property_changed) \
-    ((GDBusPropertyInfo *) &((const struct _NMDBusPropertyInfoExtendedBase){                      \
-        ._parent =                                                                                \
-            {                                                                                     \
-                .ref_count = -1,                                                                  \
-                .name      = m_name,                                                              \
-                .signature = m_signature,                                                         \
-                .flags     = G_DBUS_PROPERTY_INFO_FLAGS_READABLE,                                 \
-            },                                                                                    \
-        .property_name                      = m_property_name,                                    \
-        .include_in_legacy_property_changed = m_include_in_legacy_property_changed,               \
-    }))
 
 #define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE(m_name, m_signature, m_property_name) \
-    NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_FULL(m_name, m_signature, m_property_name, FALSE)
-
-/* define a legacy property. Do not use for new code. */
-#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(m_name, m_signature, m_property_name) \
-    NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_FULL(m_name, m_signature, m_property_name, TRUE)
-
-#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_FULL(                            \
-    m_name,                                                                                 \
-    m_signature,                                                                            \
-    m_property_name,                                                                        \
-    m_permission,                                                                           \
-    m_audit_op,                                                                             \
-    m_include_in_legacy_property_changed)                                                   \
-    ((GDBusPropertyInfo *) &((const struct _NMDBusPropertyInfoExtendedReadWritable){        \
-        ._base =                                                                            \
-            {                                                                               \
-                ._parent =                                                                  \
-                    {                                                                       \
-                        .ref_count = -1,                                                    \
-                        .name      = m_name,                                                \
-                        .signature = m_signature,                                           \
-                        .flags     = G_DBUS_PROPERTY_INFO_FLAGS_READABLE                    \
-                                 | G_DBUS_PROPERTY_INFO_FLAGS_WRITABLE,                     \
-                    },                                                                      \
-                .property_name                      = m_property_name,                      \
-                .include_in_legacy_property_changed = m_include_in_legacy_property_changed, \
-            },                                                                              \
-        .permission = m_permission,                                                         \
-        .audit_op   = m_audit_op,                                                           \
+    ((GDBusPropertyInfo *) &((const struct _NMDBusPropertyInfoExtendedBase){                 \
+        ._parent =                                                                           \
+            {                                                                                \
+                .ref_count = -1,                                                             \
+                .name      = m_name,                                                         \
+                .signature = m_signature,                                                    \
+                .flags     = G_DBUS_PROPERTY_INFO_FLAGS_READABLE,                            \
+            },                                                                               \
+        .property_name = m_property_name,                                                    \
     }))
 
-#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(m_name,           \
-                                                           m_signature,      \
-                                                           m_property_name,  \
-                                                           m_permission,     \
-                                                           m_audit_op)       \
-    NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_FULL(m_name,          \
-                                                            m_signature,     \
-                                                            m_property_name, \
-                                                            m_permission,    \
-                                                            m_audit_op,      \
-                                                            FALSE)
-
-/* define a legacy property. Do not use for new code. */
-#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(m_name,          \
-                                                             m_signature,     \
-                                                             m_property_name, \
-                                                             m_permission,    \
-                                                             m_audit_op)      \
-    NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_FULL(m_name,           \
-                                                            m_signature,      \
-                                                            m_property_name,  \
-                                                            m_permission,     \
-                                                            m_audit_op,       \
-                                                            TRUE)
+#define NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(m_name,                   \
+                                                           m_signature,              \
+                                                           m_property_name,          \
+                                                           m_permission,             \
+                                                           m_audit_op)               \
+    ((GDBusPropertyInfo *) &((const struct _NMDBusPropertyInfoExtendedReadWritable){ \
+        ._base =                                                                     \
+            {                                                                        \
+                ._parent =                                                           \
+                    {                                                                \
+                        .ref_count = -1,                                             \
+                        .name      = m_name,                                         \
+                        .signature = m_signature,                                    \
+                        .flags     = G_DBUS_PROPERTY_INFO_FLAGS_READABLE             \
+                                 | G_DBUS_PROPERTY_INFO_FLAGS_WRITABLE,              \
+                    },                                                               \
+                .property_name = m_property_name,                                    \
+            },                                                                       \
+        .permission = m_permission,                                                  \
+        .audit_op   = m_audit_op,                                                    \
+    }))
 
 typedef struct _NMDBusMethodInfoExtended {
     GDBusMethodInfo parent;
@@ -148,14 +96,8 @@ typedef struct _NMDBusMethodInfoExtended {
 
 typedef struct _NMDBusInterfaceInfoExtended {
     GDBusInterfaceInfo parent;
-
-    /* Whether the interface has a legacy property changed signal (@nm_signal_info_property_changed_legacy).
-     * New interfaces should not use this. */
-    bool legacy_property_changed : 1;
 } NMDBusInterfaceInfoExtended;
 
-extern const GDBusSignalInfo nm_signal_info_property_changed_legacy;
-
 #define NM_DBUS_INTERFACE_INFOS(...)                                           \
     ({                                                                         \
         static const NMDBusInterfaceInfoExtended *const _interface_infos[] = { \
diff --git a/src/core/nm-dhcp-config.c b/src/core/nm-dhcp-config.c
index c77e0adbaf..1cbad49e2f 100644
--- a/src/core/nm-dhcp-config.c
+++ b/src/core/nm-dhcp-config.c
@@ -194,12 +194,10 @@ nm_dhcp4_config_init(NMDhcp4Config *self)
 static const NMDBusInterfaceInfoExtended interface_info_dhcp4_config = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DHCP4_CONFIG,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Options",
-                                                             "a{sv}",
-                                                             NM_DHCP_CONFIG_OPTIONS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Options",
+                                                           "a{sv}",
+                                                           NM_DHCP_CONFIG_OPTIONS), ), ),
 };
 
 static void
@@ -234,12 +232,10 @@ nm_dhcp6_config_init(NMDhcp6Config *self)
 static const NMDBusInterfaceInfoExtended interface_info_dhcp6_config = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_DHCP6_CONFIG,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Options",
-                                                             "a{sv}",
-                                                             NM_DHCP_CONFIG_OPTIONS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Options",
+                                                           "a{sv}",
+                                                           NM_DHCP_CONFIG_OPTIONS), ), ),
 };
 
 static void
diff --git a/src/core/nm-ip4-config.c b/src/core/nm-ip4-config.c
index a6072ccb44..171ed4bae1 100644
--- a/src/core/nm-ip4-config.c
+++ b/src/core/nm-ip4-config.c
@@ -3143,44 +3143,40 @@ finalize(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_ip4_config = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_IP4_CONFIG,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Addresses",
-                                                             "aau",
-                                                             NM_IP4_CONFIG_ADDRESSES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("AddressData",
-                                                             "aa{sv}",
-                                                             NM_IP4_CONFIG_ADDRESS_DATA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Gateway", "s", NM_IP4_CONFIG_GATEWAY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Routes", "aau", NM_IP4_CONFIG_ROUTES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("RouteData",
-                                                             "aa{sv}",
-                                                             NM_IP4_CONFIG_ROUTE_DATA),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Addresses",
+                                                           "aau",
+                                                           NM_IP4_CONFIG_ADDRESSES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("AddressData",
+                                                           "aa{sv}",
+                                                           NM_IP4_CONFIG_ADDRESS_DATA),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Gateway", "s", NM_IP4_CONFIG_GATEWAY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Routes", "aau", NM_IP4_CONFIG_ROUTES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("RouteData",
+                                                           "aa{sv}",
+                                                           NM_IP4_CONFIG_ROUTE_DATA),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("NameserverData",
                                                            "aa{sv}",
                                                            NM_IP4_CONFIG_NAMESERVER_DATA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Nameservers",
-                                                             "au",
-                                                             NM_IP4_CONFIG_NAMESERVERS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Domains",
-                                                             "as",
-                                                             NM_IP4_CONFIG_DOMAINS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Searches",
-                                                             "as",
-                                                             NM_IP4_CONFIG_SEARCHES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DnsOptions",
-                                                             "as",
-                                                             NM_IP4_CONFIG_DNS_OPTIONS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DnsPriority",
-                                                             "i",
-                                                             NM_IP4_CONFIG_DNS_PRIORITY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Nameservers",
+                                                           "au",
+                                                           NM_IP4_CONFIG_NAMESERVERS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Domains", "as", NM_IP4_CONFIG_DOMAINS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Searches",
+                                                           "as",
+                                                           NM_IP4_CONFIG_SEARCHES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DnsOptions",
+                                                           "as",
+                                                           NM_IP4_CONFIG_DNS_OPTIONS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DnsPriority",
+                                                           "i",
+                                                           NM_IP4_CONFIG_DNS_PRIORITY),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WinsServerData",
                                                            "as",
                                                            NM_IP4_CONFIG_WINS_SERVER_DATA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WinsServers",
-                                                             "au",
-                                                             NM_IP4_CONFIG_WINS_SERVERS), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WinsServers",
+                                                           "au",
+                                                           NM_IP4_CONFIG_WINS_SERVERS), ), ),
 };
 
 static void
diff --git a/src/core/nm-ip6-config.c b/src/core/nm-ip6-config.c
index ce7a4009f9..8793c1c27a 100644
--- a/src/core/nm-ip6-config.c
+++ b/src/core/nm-ip6-config.c
@@ -2585,37 +2585,33 @@ finalize(GObject *object)
 static const NMDBusInterfaceInfoExtended interface_info_ip6_config = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_IP6_CONFIG,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Addresses",
-                                                             "a(ayuay)",
-                                                             NM_IP6_CONFIG_ADDRESSES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("AddressData",
-                                                             "aa{sv}",
-                                                             NM_IP6_CONFIG_ADDRESS_DATA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Gateway", "s", NM_IP6_CONFIG_GATEWAY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Routes",
-                                                             "a(ayuayu)",
-                                                             NM_IP6_CONFIG_ROUTES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("RouteData",
-                                                             "aa{sv}",
-                                                             NM_IP6_CONFIG_ROUTE_DATA),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Nameservers",
-                                                             "aay",
-                                                             NM_IP6_CONFIG_NAMESERVERS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Domains",
-                                                             "as",
-                                                             NM_IP6_CONFIG_DOMAINS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Searches",
-                                                             "as",
-                                                             NM_IP6_CONFIG_SEARCHES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DnsOptions",
-                                                             "as",
-                                                             NM_IP6_CONFIG_DNS_OPTIONS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("DnsPriority",
-                                                             "i",
-                                                             NM_IP6_CONFIG_DNS_PRIORITY), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Addresses",
+                                                           "a(ayuay)",
+                                                           NM_IP6_CONFIG_ADDRESSES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("AddressData",
+                                                           "aa{sv}",
+                                                           NM_IP6_CONFIG_ADDRESS_DATA),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Gateway", "s", NM_IP6_CONFIG_GATEWAY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Routes",
+                                                           "a(ayuayu)",
+                                                           NM_IP6_CONFIG_ROUTES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("RouteData",
+                                                           "aa{sv}",
+                                                           NM_IP6_CONFIG_ROUTE_DATA),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Nameservers",
+                                                           "aay",
+                                                           NM_IP6_CONFIG_NAMESERVERS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Domains", "as", NM_IP6_CONFIG_DOMAINS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Searches",
+                                                           "as",
+                                                           NM_IP6_CONFIG_SEARCHES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DnsOptions",
+                                                           "as",
+                                                           NM_IP6_CONFIG_DNS_OPTIONS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("DnsPriority",
+                                                           "i",
+                                                           NM_IP6_CONFIG_DNS_PRIORITY), ), ),
 };
 
 static void
diff --git a/src/core/nm-manager.c b/src/core/nm-manager.c
index e866eec0d9..1649b968ae 100644
--- a/src/core/nm-manager.c
+++ b/src/core/nm-manager.c
@@ -8423,76 +8423,74 @@ static const NMDBusInterfaceInfoExtended interface_info_manager = {
                         NM_DEFINE_GDBUS_ARG_INFO("checkpoint", "o"),
                         NM_DEFINE_GDBUS_ARG_INFO("add_timeout", "u"), ), ),
                 .handle = impl_manager_checkpoint_adjust_rollback_timeout, ), ),
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &signal_info_check_permissions,
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_check_permissions,
                                                 &signal_info_state_changed,
                                                 &signal_info_device_added,
                                                 &signal_info_device_removed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Devices", "ao", NM_MANAGER_DEVICES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("AllDevices",
-                                                             "ao",
-                                                             NM_MANAGER_ALL_DEVICES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Checkpoints",
-                                                             "ao",
-                                                             NM_MANAGER_CHECKPOINTS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("NetworkingEnabled",
-                                                             "b",
-                                                             NM_MANAGER_NETWORKING_ENABLED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Devices", "ao", NM_MANAGER_DEVICES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("AllDevices",
+                                                           "ao",
+                                                           NM_MANAGER_ALL_DEVICES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Checkpoints",
+                                                           "ao",
+                                                           NM_MANAGER_CHECKPOINTS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("NetworkingEnabled",
+                                                           "b",
+                                                           NM_MANAGER_NETWORKING_ENABLED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "WirelessEnabled",
                 "b",
                 NM_MANAGER_WIRELESS_ENABLED,
                 NM_AUTH_PERMISSION_ENABLE_DISABLE_WIFI,
                 NM_AUDIT_OP_RADIO_CONTROL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WirelessHardwareEnabled",
-                                                             "b",
-                                                             NM_MANAGER_WIRELESS_HARDWARE_ENABLED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WirelessHardwareEnabled",
+                                                           "b",
+                                                           NM_MANAGER_WIRELESS_HARDWARE_ENABLED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "WwanEnabled",
                 "b",
                 NM_MANAGER_WWAN_ENABLED,
                 NM_AUTH_PERMISSION_ENABLE_DISABLE_WWAN,
                 NM_AUDIT_OP_RADIO_CONTROL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WwanHardwareEnabled",
-                                                             "b",
-                                                             NM_MANAGER_WWAN_HARDWARE_ENABLED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WwanHardwareEnabled",
+                                                           "b",
+                                                           NM_MANAGER_WWAN_HARDWARE_ENABLED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "WimaxEnabled",
                 "b",
                 NM_MANAGER_WIMAX_ENABLED,
                 NM_AUTH_PERMISSION_ENABLE_DISABLE_WIMAX,
                 NM_AUDIT_OP_RADIO_CONTROL),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("WimaxHardwareEnabled",
-                                                             "b",
-                                                             NM_MANAGER_WIMAX_HARDWARE_ENABLED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ActiveConnections",
-                                                             "ao",
-                                                             NM_MANAGER_ACTIVE_CONNECTIONS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("PrimaryConnection",
-                                                             "o",
-                                                             NM_MANAGER_PRIMARY_CONNECTION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("PrimaryConnectionType",
-                                                             "s",
-                                                             NM_MANAGER_PRIMARY_CONNECTION_TYPE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Metered", "u", NM_MANAGER_METERED),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("ActivatingConnection",
-                                                             "o",
-                                                             NM_MANAGER_ACTIVATING_CONNECTION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Startup", "b", NM_MANAGER_STARTUP),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Version", "s", NM_MANAGER_VERSION),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Capabilities",
-                                                             "au",
-                                                             NM_MANAGER_CAPABILITIES),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("State", "u", NM_MANAGER_STATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Connectivity",
-                                                             "u",
-                                                             NM_MANAGER_CONNECTIVITY),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L(
-                "ConnectivityCheckAvailable",
-                "b",
-                NM_MANAGER_CONNECTIVITY_CHECK_AVAILABLE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("WimaxHardwareEnabled",
+                                                           "b",
+                                                           NM_MANAGER_WIMAX_HARDWARE_ENABLED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ActiveConnections",
+                                                           "ao",
+                                                           NM_MANAGER_ACTIVE_CONNECTIONS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PrimaryConnection",
+                                                           "o",
+                                                           NM_MANAGER_PRIMARY_CONNECTION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PrimaryConnectionType",
+                                                           "s",
+                                                           NM_MANAGER_PRIMARY_CONNECTION_TYPE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Metered", "u", NM_MANAGER_METERED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ActivatingConnection",
+                                                           "o",
+                                                           NM_MANAGER_ACTIVATING_CONNECTION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Startup", "b", NM_MANAGER_STARTUP),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Version", "s", NM_MANAGER_VERSION),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Capabilities",
+                                                           "au",
+                                                           NM_MANAGER_CAPABILITIES),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("State", "u", NM_MANAGER_STATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Connectivity",
+                                                           "u",
+                                                           NM_MANAGER_CONNECTIVITY),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ConnectivityCheckAvailable",
+                                                           "b",
+                                                           NM_MANAGER_CONNECTIVITY_CHECK_AVAILABLE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "ConnectivityCheckEnabled",
                 "b",
                 NM_MANAGER_CONNECTIVITY_CHECK_ENABLED,
@@ -8501,13 +8499,12 @@ static const NMDBusInterfaceInfoExtended interface_info_manager = {
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ConnectivityCheckUri",
                                                            "s",
                                                            NM_MANAGER_CONNECTIVITY_CHECK_URI),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE_L(
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READWRITABLE(
                 "GlobalDnsConfiguration",
                 "a{sv}",
                 NM_MANAGER_GLOBAL_DNS_CONFIGURATION,
                 NM_AUTH_PERMISSION_SETTINGS_MODIFY_GLOBAL_DNS,
                 NM_AUDIT_OP_NET_CONTROL), ), ),
-    .legacy_property_changed = TRUE,
 };
 
 static void
diff --git a/src/core/settings/nm-settings-connection.c b/src/core/settings/nm-settings-connection.c
index 730a961b82..e05fb0751f 100644
--- a/src/core/settings/nm-settings-connection.c
+++ b/src/core/settings/nm-settings-connection.c
@@ -2673,20 +2673,17 @@ static const NMDBusInterfaceInfoExtended interface_info_settings_connection = {
                     .out_args =
                         NM_DEFINE_GDBUS_ARG_INFOS(NM_DEFINE_GDBUS_ARG_INFO("result", "a{sv}"), ), ),
                 .handle = impl_settings_connection_update2, ), ),
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &signal_info_updated,
-                                                &signal_info_removed, ),
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_updated, &signal_info_removed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Unsaved",
-                                                             "b",
-                                                             NM_SETTINGS_CONNECTION_UNSAVED),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Unsaved",
+                                                           "b",
+                                                           NM_SETTINGS_CONNECTION_UNSAVED),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Flags",
                                                            "u",
                                                            NM_SETTINGS_CONNECTION_FLAGS),
             NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Filename",
                                                            "s",
                                                            NM_SETTINGS_CONNECTION_FILENAME), ), ),
-    .legacy_property_changed = TRUE,
 };
 
 static void
diff --git a/src/core/settings/nm-settings.c b/src/core/settings/nm-settings.c
index 511978ac7e..1b1bfda88f 100644
--- a/src/core/settings/nm-settings.c
+++ b/src/core/settings/nm-settings.c
@@ -4026,18 +4026,16 @@ static const NMDBusInterfaceInfoExtended interface_info_settings = {
                     .in_args =
                         NM_DEFINE_GDBUS_ARG_INFOS(NM_DEFINE_GDBUS_ARG_INFO("hostname", "s"), ), ),
                 .handle = impl_settings_save_hostname, ), ),
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &signal_info_new_connection,
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_new_connection,
                                                 &signal_info_connection_removed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Connections",
-                                                             "ao",
-                                                             NM_SETTINGS_CONNECTIONS),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Hostname", "s", NM_SETTINGS_HOSTNAME),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("CanModify",
-                                                             "b",
-                                                             NM_SETTINGS_CAN_MODIFY), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Connections",
+                                                           "ao",
+                                                           NM_SETTINGS_CONNECTIONS),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Hostname", "s", NM_SETTINGS_HOSTNAME),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("CanModify",
+                                                           "b",
+                                                           NM_SETTINGS_CAN_MODIFY), ), ),
 };
 
 static void
diff --git a/src/core/vpn/nm-vpn-connection.c b/src/core/vpn/nm-vpn-connection.c
index b8567e6cd0..d06ca46adc 100644
--- a/src/core/vpn/nm-vpn-connection.c
+++ b/src/core/vpn/nm-vpn-connection.c
@@ -2906,16 +2906,14 @@ static const GDBusSignalInfo signal_info_vpn_state_changed = NM_DEFINE_GDBUS_SIG
 static const NMDBusInterfaceInfoExtended interface_info_vpn_connection = {
     .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
         NM_DBUS_INTERFACE_VPN_CONNECTION,
-        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy,
-                                                &signal_info_vpn_state_changed, ),
+        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&signal_info_vpn_state_changed, ),
         .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VpnState",
-                                                             "u",
-                                                             NM_VPN_CONNECTION_VPN_STATE),
-            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Banner",
-                                                             "s",
-                                                             NM_VPN_CONNECTION_BANNER), ), ),
-    .legacy_property_changed = TRUE,
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("VpnState",
+                                                           "u",
+                                                           NM_VPN_CONNECTION_VPN_STATE),
+            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Banner",
+                                                           "s",
+                                                           NM_VPN_CONNECTION_BANNER), ), ),
 };
 
 static void