As it stands right now most auto repairs are so expensive we live in a throw away world now, even for cars. As long as this is optional(which it won't be) it might have some use.
PS: are you really going to let go of the steering wheel of your 50,000 car going 80 mph?
You are correct. Whenever we get a “new” car, it’s at least 10 years old. If self driving cars were required, we would be unable to drive-big problem in our rural area.