Most, if not all, of that stuff (seat, mirror, etc) can be done today, with no AI in your car, based on different keys/fobs for example.
The spying, hacks, etc is different, I'd like to see someone remotely hack a physical button/knob over wifi/bluetooth/etc.
You could create a lot of things, doesn't mean it's going to happen (wrt the hardened offline OS).
Car software today is already a mess of mostly duct taped together shit code that rarely get updates after a few years, since it's not profitable to do so.