I've imitated something like this for my Steam Deck by just keeping a bunch of games on sdcard and switching them out when I want to play something else. Sure, it's technically a complete waste of time and I don't suggest you do or anybody else do it. But I have fun doing it and that's all that matters in this case that has no effect on anybody else.

I find it odd when people on Hacker News say "but why?" Because I can, dude, and it makes me happy.

On that note, this project sounds awesome to me.