I agree. My thinking is that the only place where any desktop app is still actively developed is the enterprise (and even there the trend is to get everything web based), and this is predominantly a windows environment. Outside of the enterprise everything has gone mobile where wpf isn't really an option (solutions like Xamarin aren't fun to use).

My guess is that desktop apps will come back with pwa+wasm. Then you can have a rich client that is fully cross platform, single code base, same behavior everywhere, easy to deploy, written in the language of your choice. But that doesn't involve wpf...