It's not that, either. Low-margin, high-volume contracts are the worst business you can take. It devalues TSMC's work and creates an unnatural downward force on the price of cutting-edge silicon. By ignoring Apple's demands they're creating natural competition that raises the value of their entire portfolio.

It really is about making better hardware. Apple would be out-bidding Nvidia right now, but only if the iPhone had equivalent value-add to Nvidia hardware. Alas, iPhones are overpriced and underpowered, most people will agree.