Comment by gortok
I want to switch to Linux for my EOL Windows 10 originally-built-for-gaming rig. It was “new” in 2016, so I hold out hope that there will be few compatibility issues. My biggest concerns are being able to play my library of steam games on it. Overall the problems I have are that last time I tried to put Linux on that machine I tried a dual boot system, and at the time UEFI did not play well with dual booting. I don’t know if it’s gotten better, but as of now I wouldn’t be dual booting anyway so conceivably it wouldn’t be an issue.
I doubt the dual boot issue was due to UEFI. It's more likely, Windows was clobbering over GRUB and overwriting your bootloader, as it likes to do. Windows really wants to be the only OS on your drive.
Most reliable way I've ran dual boot systems is to have each OS on it's own separate drive, and then choose with the UEFI boot menu which one to boot instead of choosing in GRUB off a single drive.
As for games, plug them into protondb (https://www.protondb.com) to see compatibility & read through the comments