I have been using Windows 10 over Boot Camp 100% of the time with my 2012 MacBook Pro and really love it - the only thing I think that I notice is multitasking performance is significantly worse if you push the computer to it's limits. I think MacOS certainly has better RAM management / multitasking performance in extreme circumstances.
For example, if I run Adobe Photoshop, Chrome w/ several tabs, and Solidworks, no problem. I have a few GBs of RAM left and it's cool. Everything runs beautifully.
But push another app like Illustrator or InDesign or Protopie, and make the computer use that full 16 GBs, and it's toast. I absolutely cannot get work done and need to close an app or two.
Whereas when I used to use MacOS, even if I was pushing the full 16 GBs, while a little slow to switch between apps, the application I am focused on tended to perform just fine.
Again, not a HUGE deal, because that's really an extreme circumstance in multitasking, but it is something I will be aware of when I purchase my next computer.