Not having lots of SKUs and a user-managed OS is kinda what the console experience is about. Steam OS does not deliver a console experience. Steam Deck kinda does (except not really), but Steam OS is just a part of that.

MS has sold more S than X, according to a quick google. Not sure why you’d want to port a game to Xbox Series X without making the game playable on S.

NixOS is like that every day for no reason