The late Steve Jobs was impressed by 'The Innovators Dilemma,' a book by Clayton Christensen, and he took the central lesson - success can kill you by making you deaf to the sound of change or risk-averse and hostage to positive cash flow. Apple's willful disregard of what works, now, for what will (they expect) work tomorrow is courage institutionalized. I don't always care for their decisions, but I believe that I understand why, and it's hard to second-guess their continued success.