[bunderbunder]

They are for WinForms and WinRT, but not so much for WPF. That one's closely related to Silverlight, which also runs on other platforms.

I doubt WPF is going to make a big comeback, though.

[pjmlp]

WPF is still the way to go for many desktop enterprise apps.

Thankfully there are still plenty of use cases not covered by web UIs.