I'd be shocked if someone didn't find a way to back up Roblox similar to how people did with old Flash games.

That said, when I checked it out again last year, a lot of the games on it were basically the same low effort copy and paste trash as when I originally played back in 2008, so I'd also imagine the vast majority of stuff on it really doesn't need to be archived unless you're trying to be a completionist lol