My experience from scaling products in very different areas (consumer tech, large public infrastructure, internet): That occasional hiccup during small-scale trials looks very different with hundreds or millions of units.
How much better?
From the article: "Waymo’s vehicles have been involved in 94% fewer crashes that cause serious injury or worse than human drivers on the same roads."
The longer safe autonomous vehicles are obstructed through legislation, the more people die.
https://www.thestreet.com/technology/waymo-exec-admits-harsh...
Maybe autonomous vehicles need to work so well that practically everyone agrees they’re a good idea?
Anecdotal, but I’ve owned a couple of cars with assistive/“self-driving” - including Tesla’s. I can’t count the number of times I’ve had to take over.