I think computers in cars are fine when they're used to control specific functions -- for example fuel injection is great. But when the entire car is integrated as one huge system (CAN-BUS nightmares) it causes much pain. I have a few examples.
My wife clipped the side blinker which hangs off the side view mirror on the side of the garage while backing out; it caused the blinker lens to be broken off; this broke the wires to the blinker in the mirror. Note this car has no other electronic function attached in that mirror (no blind spot monitoring or other safety features). However, once this happened the entire car started going wonky. The transmission overtemp warning light came on. It locked itself into park and refused to come out without manual override. Dash lights started glowing like a Christmas tree. Couldn't drive it. Towed to dealer and they had to replace (in addition to the ~$100 blinker part) the entire central computer thing. Wuuuuttt.......
Unrelated: I'm renting a GMC SUV; it has so many electronics. It has blind spot monitoring which is constantly telling me **** is in my blind spot even when it's not. The computer is obviously not fast enough to keep up with everything because a bunch of features on the screen (and responsiveness of controls) is laggy; like I'll put it into reverse and sometimes the backup camera comes right on and other times it takes 10 seconds; sometimes the heater controls switch immediately other times it doesn't; sometimes blind spot picks up semi trucks next to me, sometimes it doesn't (already mentioned how it picks up ghosts).
Back to my wife's car; it also has subaru "eye sight" -- most nightmarish thing I've ever used. The "adaptive cruise control" is a nightmare, it basically turns the car into "*******" driving mode where it leaves huge space between your car and the car in front of you, so people are constantly getting into it, and then when they do, the adaptive cruise control freaks out that it's following too close and it hammers the brakes, causing everyone behind me to have to brake aggressively, too.
The naggy "lane departure warning" system gets confused when the roads are wet, it thinks puddles are the edge of the road; it cries when you cross the lines to dodge trash cans or pedestrians or pot holes.
I feel like the automatic braking is going to kill me one day. It randomly detects that I'm about to crash into something and starts freaking out; it beeps loud and starts flashing red warnings all over the dash, but there's nothing there but clear road. It's like it's detecting shadows or glare or a single rain drop, I have no idea. The whole thing is a complete mess. So far it hasn't actually initiated the brakes but it sure seems like it's going to.
The whole eyesight system shuts down if it's too rainy, snowy, foggy, or just randomly (and it doesn't take that much rain); just when you would assume it would be needed most.
My wife and I both hate it and we hope that when it comes time to buy a new car we can find one without this type of crap. If "self driving" is based on any tech in the same realm as this, we are all doomed.