Many comments in this thread are variations on a theme of "self-driving cars don't need to be perfect, they just need to be better than human drivers, who aren't actually all that great." I think it would be nice if this were true, and I suppose it is from an actuarial perspective, but it's also an extremely flawed point. From a public confidence perspective, it doesn't matter if a self-driving car crashes one tenth,…
We have seen this before with autopilots in aircraft and ship, elevator operators and so on.
All it needs is time and adoption, not perfection, and as adoption increases, the roads get safer and safer, bringing us closer to the ideal, and as time increases, the closer we get to adoption.