But those are still digital-only platforms, with a chance of them disappearing. Epic is the biggest risk there, I think.

GoG is an interesting case though, it has loads of games that by and large were available on physical media, but because said physical media is either gone, broken, or in the hands of collectors, getting a physical copy of those games is difficult now. Them being a digital platform re-enables people to play these games.

It's important to note that that vendor specific computer is 1) cheaper then a PC that can play equivalent games, and 2) much more reliable (i never have to mess with drivers, updates just work, etc...)