This is the continuation of bringing UWP security model into Win32, and make Windows security features all enabled by default.
See BlueHat IL talk on the matter,
https://youtu.be/8T6ClX-y2AE
There are no plans for Windows 10, beyond security fixes until 2025, it is done.
EDIT: There is a BUILD 2023 talk on the matter as well.
https://youtu.be/w6VwHGPz12w