I seriously hope Microsoft consolidates all their Windows app dev on WinUI and invests heavily in making it great.

I also wish that they’d make WinUI work on macOS as well similar to Avalonia, but I think they probably won’t.

There's now an Avalonia back-end for .NET MAUI in preview, so they are making an effort on that cross-platform front too. Link: https://avaloniaui.net/blog/maui-avalonia-preview-1