I think it's really the integration between hardware and software, nearly all of which is under Apple's control. Most companies don't do vertical integration a

I think it's really the integration between hardware and software, nearly all of which is under Apple's control. Most companies don't do vertical integration anymore, and it shows. It's harder to produce a polished product when the hardware parts come from a bunch of different manufacturers, and you have to fight to get your software to work on it.