Lets not forget that after five years Project Reunion was announced, WinUI 3.0 is yet to achieve feature parity with the Visual Studio experience developing C# or C++ applications, or UWP components features.

The WinUI map component is a Webview2 instead of proper native component, Win2D is only a subset of the UWP one, ink is yet to be migrated, and lots of other issues.

Github repos are filled with thousands of issues, and they already did a cleanup a year ago where they simply closed enough tickets to bring it under 2000.