Uber is pretty middle of the pack as far as the state of their progress developing this technology is concerned. One intervention per mile on average isn't any kind of scathing indictment of Uber's autonomous driving program. The sensationalism of Uber's leaked intervention report mostly just illustrates a disconnect between public perception about where the technology is at, and where it's really at.

There are 23 other companies with permits to test autonomous vehicles in CA and they're all doing pretty much the same thing. Waymo is way out in front, Cruise/GM is doing well, but there are maybe a half dozen large, deeply invested players (including Tesla) not nearly as advanced as Uber.