I don't think they did. They said increasingly so. They're just getting at Microsoft continually re-inventing the wheel and then abandoning that wheel when it comes to their GUI libraries. There's WinForms -> WPF -> UDP -> WinUI, Xamarin Forms -> .NET MAUI, and then the evolution of Avalonia and Uno as third-parties trying to step in. And all of those options still exist! You literally have a minimum of 8 GUI options, at least on Windows. There are of course more by external parties.
If I am doing desktop development, you can bet I am still using WinForms, which are relatively easy to debug (if not as pretty) as WPF. I am usually building internal tooling, without paying customers, and sometimes for a user base of just me.
