Seems like cars are much less reparable than those from the 80s which are then worse than 60s. Electronics are part of this, but so is making cars lighter, more integrated, more fuel efficient. Old cars it is e.g much easier to do a tranny rebuild, new ones they are too damn sensitive and its much harder, and this extends to doing basically any repair. If larger laptops that are easier to repair are good for consumers you'd think so would cars like that, but no, fuel efficiency must trump all.
There are car mfgs where you have to maintain pretty strict voltages as you reprogram modules else they will brick themselves. They want to prevent Garage Joe or Jane from fixing his or her own car and instead have them go to the dealership and prevents owners from using used parts -so less "green".
