Ah, I see - well, chalk that up to my having very little knowledge about the iOS ecosystem. I think my larger point still stands, that Apple's arrogant assertion of ownership of
everything is going to bite them; arguably this is just telling everybody where they
have to store their data. With Apple.
And honestly, if /tmp were the only filesystem I were allowed to touch, then yeah, I'd try to do something with it. That's kinda screwed up.