"Wil said something about that none of the applications that he was really fond of, were written in a GC-language. That it would be impossible to write Delicious Library in one for performance reasons!"

So the same person who uses something as abstract and far-away from the hardware as Cocoa Bindings to keep insane amounts of on-screen information in sync (http://developer.apple.com/business/macmarket/deliciouslibrary.html) thinks it's beyond Apple to create a reasonably fast garbage collector?