It's a shame Windows Phones didn't take off. They had a great UI paradigm and I think Microsoft has done a lot of very hard work that goes mostly unappreciated in the development world, just because Google's reputation is still based on a decade-old memory of their (never official) motto "don't be evil". Microsoft hasn't been the "Halloween Papers" company for longer than Google has been a company, period.
EDIT: I'm not saying MS isn't an evil corporation. I think all corporations get to some degree of evil proportional to their size. But for some reason, Google and Apple don't get that same evaluation, getting some sort of pass, that I think is worse in the specific case of Google (being an ad-tech company). We are collectively missing out on a lot of inovation and market diversity because of this cognitive dissonance.
And also like UWP a lot, although its implementation was rather clusmy with the whole DevDiv vs WinDev issues.