Something that the Windows 10 proponents never bother to mention is that DX8 games do not run properly on Windows 10. They're forced to run in full-screen windowed mode instead of true fullscreen mode. That's something to keep in mind if you play a lot of older games.
In my experience, new versions of Android tend to represent a net benefit. For me, Windows 10's regressions more than cancel out it's improvements over 7.
That said, there's a difference between providing ongoing security updates and full OS upgrades, and most of the Android related complaints I hear are concerning the former. When it comes to major OS upgrades, the Android community is much like the Windows community in that there are always people who prefer to stay on older versions, or end up rolling back after an upgrade.
Finally, having a solid OS on my PC is far more important to me than having a solid OS on my phone, because I don't do any serious productivity or gaming on the latter.