What I wonder when I see these statistics, though, is whether all miles are really equal? For example, are Tesla drivers more comfortable using Autopilot in "easy" driving situations? Is there really a one-to-one correspondence in the distribution of the kinds of miles driven with Autopilot on vs. normal cars?
Furthermore, the metric commonly cited is "fatalities ever N miles." Are there fewer fatalities because Autopilot is great, or because Teslas are safer in general? Has there been a comparison between fatalities with/without Autopilot strictly on Teslas? Even then, it seems to me we are subject to this potentially biased notion of "miles" I mentioned previously. The Wikipedia article you mentioned cites a 50% reduction in accidents with Autopilot, but the citation is to an Elon Musk interview. I haven't yet seen anything official to back this up, but if anyone has any information on this, I'd love to see it!