Microsoft only has itself to blame. They reset the ecosystem 3 times. First with Windows Phone 7 (no backwards-compatibility with Windows Mobile 6 and prior), t

Microsoft only has itself to blame. They reset the ecosystem 3 times. First with Windows Phone 7 (no backwards-compatibility with Windows Mobile 6 and prior), then with Windows Phone 8, and finally with Windows 10. If you're already struggling to get developer mindshare, the last thing you should be doing is making backwards-incompatible changes every other year and force everyone to start from scratch. A Facebook phone would have many problems, but I'm sure they would at least not be as stupid as Microsoft was.