I actually expect this to happen naturally. Pretty much the instant it becomes provable in a court of law that self-driving cars are safer than human-driven on

I actually expect this to happen naturally. Pretty much the instant it becomes provable in a court of law that self-driving cars are safer than human-driven ones, it will become impossible to buy insurance for human-driven cars (at least not at any rate most of us could afford). "So...Mr. Smith. You knew that using the autonomous driving software was safer than operating the car manually, yet you deliberately turned it off. Your faulty driving then killed Mr. Johnson and his entire family." No sane insurance company is going to defend that in court.