I'm with jb101 on this.
Updated to W10 about 6 weeks ago and, apart from getting used to little differences in the OS, I've had few issues. Sonar works pretty much just like below except for one stubborn plugin (Miroslav).
Had to re-register a couple of plugins, though, and my Miroslav Orchestra won't even open in Sonar anymore, even though I can run it as stand alone and all my other IK Multimedia plugins (Amplitube, SampleTank 3, etc) open in Sonar as always.
Eh ... looking to upgrade Miroslav to their new version anyway. Should work just fine.
Film at 11 ...
I think W7 is a better overall OS in my experience. Very similar to the good ol' XP. W10 seems built more for social media and gaming apps, and is a bit more limiting in how you can modify your files.
I'd revert back to W7, actually, if not for the fact that I know W10 is quick becoming the standard bearer for PC programing. Best to be ahead of the curve.