I've been skeptical that self-driving cars would take over since I first heard of them and I still am. I understand that humans cause accidents too, but each one of these accidents will be amplified by the media and they will be banned state by state. I'd love to see anyone driving side by side with a semi going 70 on a highway not be nervous as well with a computer at the helm.
Also, in terms of real world conditions there's too many ways to confuse the computers driving them. Maybe the sun will reflect off the side of a semi, or hit the road in a certain way. Of course, some self driving cars have laser rangefinders surrounding them and use those, but lasers can usually be fooled by smoke and such.
Of course, I could be wrong.
There is a lot to be said for the intuition of an experienced driver. I suspect that defensive driving prevents just as many accidents as following the rules of the road. I've seen plenty off accidents that may have been the fault of one driver but the other involved driver could have prevented it.
My mother's idiot husband was following a car that suddenly swerved off to the shoulder. The idiot husband didn't slow down to figure out what the leading car was doing and as he passed at speed the leading car swerved back out into the road and hit him. The leading car was looking for a particular entrance to MIS and making a U turn to get to it.
The accident was the leading car's fault but if I had been driving the following car rather than my mother's idiot husband, the accident wouldn't have happened. If I had been driving I would have immediately slowed down when the guy swerved over to the shoulder so I could get an idea of what he was doing and make sure he saw me.
I saw a study of older drivers vs younger drivers. Younger drivers had faster reflexes and reaction times but older drivers tended to look further ahead down the road and rely more heavily on accumulated knowledge. There are crossroads where I have the right of way with no stop but I'll slow to watch for traffic that is supposed to stop because I know that people unfamiliar with the corner tend to run the stop sign.
This is the sort of important thing that computers lack. They don't do gut feelings. Everything is a binary choice of right or wrong with computers in a world that isn't binary.