In Waymo’s most recently reported month, November 2017, they reported over 30,000 miles driven with only a single disengagement. It’s hard to dispute that they’re years ahead of the competition at this point.
This seems a bit odd, considering the people in other threads about self-driving cars vehemently arguing that we must switch to self-driving cars immediately to save lives.
On the bright side, once Waymo works out the bugs, we should have enough data to say their self-driving cars are probably comparable to humans in about...270 years of no failures (100M/30K/12).