Most of the points have already been said on this thread.
- People won't buy self driving cars, they'll request them; (Car as a Service)
- AI will diligently follow the rules; (Hard defined behaviour)
- SDC's don't get drunk, sleepy, emotional or stupid;
- SDC's can have more sensors than needed to do their job safely. Humans only get a pair of front facing eyes that only see during the day, and not the best ears in the world;
- SDC's will operate according to peoples needs and only park for maintenance; (Always on the road)
- SDC's can have a shared Hive Mind that allows them to drive in blocks and plan routes and maneuvers efficiently;
- Since SDC's are a touchy subject they'll be more strictly inspected and certification will be harder to get; (Just look at the 747 Max)
- SDC's will be more convenient, with no parking, no insurance, no maintenance, no refuelling/charging, etc... (Like an elevator, call, get in, push button, move and leave)
- SDC's will be cheaper to use since they'll be engineered to be as efficient as possible, while making money for as much time as possible; (Low cost airliner philosophy)