@Bene also the multi-user functionality of Steam on Linux is abominable, it can't even share installed games between users, which is probably why they went with the single user solution for SteamOS. Which sucks, I want everyone to have their private desktop, browser and settings, not one shared environment like it's the 90's and the whole family shares the same account because the parents' computer knowledge ends at knowing how to use a browser (barely).
@Bene @Amikke I don't think you got the point of the post you are replying to? There is only one user on the steam deck, and that user is named, if I remember correctly, "deck".
Yeah, you can have multiple steam users, and those steam users can share their libraries with each other, but they are still sharing the same os user, and as such sharing the same home folder.
@Amikke sharing the steam library on steamos is solved. At least in the deck UI.