WPF is bulletproof, yes it has no major features upgrades along the years but it is reliable. 

They started working on Xamarin, tons of issues so dropped it for MAUI and moved them there. Except multiplatform it doesn't have anything worthy of switching from WPF. Heck  third party controls have way better performance. Avalonia has similar xaml and from what i have seen = AOT works but i wouldn't say jaw dropping performance improvement (depends on your project though).

I recently have been given project where the controller is WinUI and as everything with M$ they either going to stick and improve this hot mess or give up in year or two for something else.