I've been looking more and more at this since I got a Steam Deck and found surprisingly good compatibility on almost every game. If Steam OS was made available for your run-of-the-mill gaming rig I'd install it in a heartbeat and give it an earnest test run.

That said, there is still a latent unease from my last misadventure with a Linux gaming PC from 2017, which ended in a LOT of restarting into Windows whenever the guys wanted to play a game I couldn't get working