Which features do you mean? Not disagreeing with you, I’m just curious.

So basically Arch?

They’re free to change the licence of future versions.

Only if they are still the only contributor. Once you have more contributors, it gets far tougher to change the licence.

It would be just as (un)popular as the Steam Machines if it wasn’t for Proton, that’s my whole point.

They already tried that in the Steam Machines era. It clearly wasn’t working.