Maybe I'm missing something, but the feeling I got regarding UWP is that it is an effort to unify the UX across all platforms and devices by aiming to lowest common denominator of all platforms. It meant that simple and useful utility like calc became a visually bloated app with sluggish UX. It meant every app takes double the screen size and offers half the functionality. In short, it made useful computer programs into passable mobile apps.
Isn't it obvious that mobile apps UI/UX is poor and is only acceptable as a compromise due to form factor limitations?
Did the strategy folks at Microsoft thought sacrificing the desktop will get them the mobile?