Both iOS 5 and iOS 6 offered hundreds of new features – with a few major ones being on the forefront. Are you suggesting a complete re-write of the OS? I suppose that's coming at some point. I've long argued that at some point the layering of features on an older OS can only go so far until you need to make a clean break. How do you navigate that transition? People love iOS and a move to something new could be jarring.