Re: "under Nadella concluded that it would never win the application support"
Nadella hates the desktop - but once MS loses it it will lose everything.
I think that sounds right.
What is Microsoft known for (or even as)?
Windows and the big Windows programme Office/office's components.
If it's all about little "apps" then why bother with MS when you can get that stuff on Android or IOs or even 'Nux
And yes, most Microsoft UWP "apps" are pretty much piles of crap.