I have been involved in automotive electrical systems and fuel control systems long enough to both witness and repair their failures.
Substandard wiring materials, environmental breaches that manifest themselves as corrosion, mechanical failures of the wiring looms and electronic parts that released their smoke.
Failed electrolytic capacitors are on the top of the list for my not liking the idea.
I used to repair Ford F series trucks with the 300 inch six in them that would arrive at our shops running on five cylinders.
After the tuneup and the timing was set in PIP timing, the SPOUT connector was re-connected and they would revert to running on five cylinders again.
The culprit was substandard wiring insulation in the primary harness that would allow a signal wire to corrode itself into a resistor.
The repair was chopping the wire in two and replacing it with better wire.
Keep in mind that the factory's main concern is for safety and quality, not production costs.
If you think otherwise, read Unsafe at any speed or go back into Ford's perfect track record with the firecracker they sold as the Pinto.
The next part is where the ride decides to take out a person at the side of the road to avoid a collision with another vehicle, but I guess that is cool because the self driving cars will save more lives in the bigger picture
There are way too many people in the world anyway, so it will actually be beneficial in the end
Then you will be faced with substandard repairs and neglect.
The autonomous vehicle sounds cool on paper but also lacks a direct route to liability which we already have with a meatpuppet in charge of the operation.