And plenty have failed. Perhaps a smaller problem space but still really, really hard. Some self driving freight company failures: Starsky, TuSimple, Embark, Ghost, among others.

One promising self driving truck startup, Aurora, was forced to put a safety driver back in the driver's seat after testing in May.

https://www.ttnews.com/articles/aurora-driver-back-in-seat

"Forced" by the truck maker, who was forced by their insurance company. All these companies will face that hurtle. I suggested to my girlfriend, who is a corporate defense attorney, that she get involved in this area of legal practice. It's a legal minefield.