On the other hand, is there any reason to prevent them? If anything, this is driving developers hard to get onto the new version, or at least compatible with it

On the other hand, is there any reason to prevent them? If anything, this is driving developers hard to get onto the new version, or at least compatible with it. Apple doesn't seem to have any incentive to prevent these reviews, and they have a big change in their platform coming up with a need to get developers on board.