Well, for one that would require GPLv4. And another one is that if you "fix" it down too much some smart-aleck comes around and says "but I was actually just running it and the results of the computation were beamed into people's brains, so they never knew about the software I was using and so I shouldn't have to release my source code". That being said, I think they should really update their Q&A; one personal one that I would really like revisited is the GPL and the App Store.