The worst bug I had on my car had the onboard computer not starting, and the screen remaining black. It meant I had: no GPS, no music, no backup camera, and no parking sensor.
But apart from that, the car was driving perfectly normal, and all the other features were working as expected.
Depends on the car brand. Some kept their dependance on software quite low like Mazda. Some decided to take a risk with the software gods and tie their entire functionality to it while simultaneously laying off good workers and rehiring the lowest bidder.
This could be an ICCU failure, where the high voltage battery doesn't properly charge the 12V. I have an EV model that is known to have this issue (luckily I haven't had it happen). It can be caused by either hardware or software faults. Still pathetic though lol
Edit: the cyber truck apparently doesn't have a 12V but rather a 48V system. I'm not sure if this same issue or a similar one is happening, or something else entirely.