I play mosty either indy games or just older games on an older gaming laptop (geforce 1070m based HP Omen) and Steam/Linux Mint work pretty great. Outer Wilds works even better in Linux now that I’ve begun using CoreCtrl to disable CPU power throttling. Otherwise, it runs about like it did on Windows. The MCC runs flawlessly. Recently purchased No Man’s Sky and it runs pretty well and is actually incredibly smooth–no idea how that one runs in Windows because I’ve been just using Linux full-time for maybe two months now.
There is some weirdness like having to process Vulcan Shades before games boot up which can be annoying, but it hasn’t discouraged me yet. You can also skip that and the only difference is there might be a bit of stuttering for the first bit of game play. After going back to Windows to compare performance, I think it does this stuttering thing anyways?