WinUI 3 is a new, cross-platform UI initiative from MS that has as a goal to separate the UWP UI/Application framework away from Windows.
Recently Nick came across a twitter thread talking about WinUI 3.0 (WinUI3) and how it failed to live up to expectations. Hopefully @JaykeBirdCoding won’t mind him going through his tweets and providing his thoughts. @JaykeBirdCoding!
Summary: You need to look into both Uno and outside the .NET ecosystem if you’re serious about cross platform.