Let’s do a thought experiment.
If the Mac disappeared today in a puff of smoke, would that result in less iPhones sold, a less prestigious brand, or maybe an improvement?
An additional argument is that companies rarely have one major product. Apple is big enough to execute well on several synergistic fronts.
$30b is an awesome business all on its own, and compliments, not detracts from, the iPhone brand.
Apple should be able to execute in multiple domains with a high degree of quality all at once.
