There's a mild delight in noting that Microsoft failed to break into someone else's platform stranglehold. Personally I wasn't sad to see it fail to obtain a place in the market.
Disclaimer -- I've never used a Microsoft phone. Indeed, I only know one person that had one - and even then it was an employer decision. Nor have I ever heard anyone wish out loud that their phone was more like their Microsoft Windows computer, or that it integrated better with their existing Microsoft systems. People who want to 'think different' could have embraced Maemo, BB, Sailfish, Firefox, or various other niche platforms. And then observed the same problem -- lack of people developing applications for them.