Could you elaborate a little on that? I'm just genuinely curious about what the "additional runtime machinery" is, what assumptions they make about runtime beha

Could you elaborate a little on that? I'm just genuinely curious about what the "additional runtime machinery" is, what assumptions they make about runtime behavior, how those assumptions break with the outlawed methods, and what those assumptions allow them to do to improve the iPhone experience. (edit: yikes, I didn't downmod you and I don't know why someone did)