.NET developers only started taking WPF seriously after the performance improvements Microsoft did to WPF, which took place after Visual Studio team adopted WPF to prove its quality.

If you intended to do any remark regarding UWP, first WPF is not going anywhere as communicated to those that care to learn what goes at Build, and second the architecture between WPF, Silverlight and UWP is almost the same, just a few differences regarding XAML features and .NET APIs.