Started dual booting Pop a few weeks ago, kept Windows for gaming for the same concern, but if you’ve got the major of your games in stream, Proton really is amazing. Had 0 issues with any game so far.
Check out Protondb and see if your current games are supported or not.
Once I’m 100% comfortable with Linux again I’ll probably bin of windows forever.
I already had a Windows install so letting Windows manage the bootloader seemed easier as I know it can cause issues if it thinks it’s not the OS as others have said.