I get where carmakers are coming from though.

Cars used to compete on distinctions between driving experience/fuel economy/reliability/etc. In comparison, differences between electric cars is mostly superfluous. They're very interchangeable.

For the next generation of car buyers, infotainment and features are going to be the main features. And if you are handing all of that away to the tech companies, your entire company is going to just become another captive hardware partner of the tech giants.

I don't know. I would argue that driving experience and reliability are still very much going to be things in the electric car market. I'm an EV9 owner and we have issues w/ the suspension making it feel sloppy over some bumps. There's going to be a ton of nuance in terms of how all of these different electric vehicles drive, ride, and are experienced. And those are all going to come down to the vehicle manufacturers themselves, not just the technology partner for screens.

If they actually planned to compete on it they could just offer Carplay support as an option, no?

... So the answer is to make a series of worse products?