I hope they don't support cars that old. That's a Microsoft move like supporting Wndows XP decades after it's been released. That kind of support slows down innovation and progress for the sake of a few cheapskates and paranoid organizations afraid to upgrade. If buyers can't get on board with the a new Apple car release every year and buy or lease their own new Apple car every 5-10 years, Apple won't be able to fix the ailing car industry.
This is preposterous. Who is going to buy a car that will only last a couple of years, when there are other options with much greater longevity? Sure, people out there are currently changing cars every few years already, but that's because after the first owner is done with the car, the car is still worth something. What you're proposing is entirely different - that Apple car will be worth $0 instead of some significant percentage of its original value.
Are you seriously thinking that Apple will produce a car that is either 1. significantly cheaper than the competition or 2. have such a competitive advantage that 100% depreciation over a few years is a drop in the bucket?
The iOS model will not work for cars. PERIOD. You're basically saying that if your car's computer dies, you're SOL even though mechanically there is nothing wrong.