The processor tech isn't going to do much for cars. They could get by with something cheaper no doubt. I don't think anyone really cares about clock speed or processor efficiency in a car because you're not really doing anything that last decades' processors couldn't handle (especially with less bloated code bases). Maybe face recognition + key fob presence to authenticate and start the car.

I don't know if Apple's quality is going to translate to cars either unless they poach a bunch of people. Safety features will compromise the quality at some point, but maybe they're good enough to work around it elegantly.

Plus people paid a premium for Apple's quality, but are they willing to do so when that premium is multiple thousands of dollars extra for a car? They could afford low/zero cost financing if they wanted to.