Agreed. I think their current performance is super impressive. I think it's possible to get even better and beat humans by lowering the number of not-at-fault incidents too (although there are only so many variables in Waymo's control).

As another commenter mentioned, the fact that the Waymo detected that a vehicle was approaching it from behind at high speed and tried to accelerate to get out of the way is super impressive, and I'm not sure even most good human drivers would have been able to do that.