> How could they be?

They could be EoLed.

> There’s simply no alternative.

Are you seriously saying there are no alternatives to WPF or Winforms?

>However, they sure aren’t alive either. Development has been stalled for many years

https://www.youtube.com/watch?v=NDYcq1yKhiA

> and both are very old.

Linux is old.

> I’m pretty sure it’s no longer feasible to modernize even WPF. I just checked: It still has its G-SYNC issues, even on .NET 5.

Or because the issue only has 6 thumbs up on Github, so MS is spending its resources elsewhere.

> Totally forgot about Xamarin too because it’s so irrelevant.

Sorry, but you just read as so salty you're hard to take seriously.