https://www.cnet.com/roadshow/news/waymo-five-million-autonomous-miles-video/

Waymo announced today that its fleet of self-driving vehicles has logged over 5 million autonomous miles on public roads. It noted that the first million miles took six years to reach, but this last million took only three months. The fleet's daily mileage is equal to what the average adult drives in an entire year.

That doesn't even count simulations, which Waymo is running constantly. In 2017, its software "drove" 2.7 billion miles. That's roughly the distance between Earth and Neptune. Neptune.