There's something weird and sad about Roblox for me as an old-timer who still has silly dreams about free/open software internet utopias for just fun? There's so much creative (programming etc) energy in that place and, for what? short rant over
Everything popular seems to start as a clone of non-Roblox games, and then goes off on it's own direction from there.
Not Roblox's fault, but it's not a good place for kids to make friends; any kind of contact information must be censored. They can play there with friends made elsewhere.