[kohanz]

Yes, in that it has been replaced by WPF and now UWP. That said, it is complete, stable, and mature. You know what you're getting with it. Going by what Microsoft recommends (e.g. whatever the latest they've put out is) isn't always a good idea. For example, early on the WPF days, there were loads of bugs in the framework. Even today, with WPF not being actively developed, it's filled with quirks and bugs that you just come to know about by working with it a lot. I'm sure UWP is in a similar state right now to early WPF, which is why I'll avoid it until it becomes more proven.