Waymos crash less than human drivers

Serious crash rates are a hockey stick pattern. 20% of the drivers cause 80% of the crashes, to a rough approximation. For the worst 20% of drivers, the Waymo is almost certainly better already.

Honestly, at this point I am more interested in whether they can operate their service profitably and affordably, because they are clearly nailing the technical side.

For example data from a 100 driver study, see table 2.11, p. 29. https://rosap.ntl.bts.gov/view/dot/37370 Roughly the same number of drivers had 0 or 1 near-crashes as had 13-50+. One of the drivers had 56 near crashes and 4 actual crashes in less than 20K miles! So the average isn't that helpful here.

What about the benefit to the 80% if the 20% were obligated to use software instead of their own wetware in a hypothetical world where this was feasible in all respects. Imagine if you transitioned to most new drivers for instance being issued only permits to use self driving vehicles and older drivers being obligated to switch at 65.