What would the return be on vertical integration that Apple does in general? About nothing vs good strategies for COTS acquisition and supply chain. So, why doe

What would the return be on vertical integration that Apple does in general? About nothing vs good strategies for COTS acquisition and supply chain. So, why does Apple do these things? To reduce risk to brand or products caused by 3rd parties plus allow them to control key aspects of technology to benefit themselves. Similarly for Mac OS. The main alternatives to watering down experience of their developers or power users are a scheming competitor with history of screwing its own ecosystem up arbitrarily and Linux distros that are lame compared to Mac/UNIX experience. I say that as an Ubuntu user. If they want their own fabs and phones, it seems fitting to also ensure their desktop experience for developers or power users is similarly low risk or tuned to their needs. Redmond and Linux surely aren't.