[HPsquared]

Not all "miles driven" are the same. Autopilot is going to be engaged on highway driving which already has a lower accident rate per mile driven. So that biases a simple comparison.

Edit: and even within highway miles, autopilot will be enabled more in the "easy" stretches and turned off in roadworks etc.

[FireBeyond]

Precisely. If these systems aren't or can't be engaged on a Pittsburgh street at night in a whiteout, then I don't much care.

Tesla jukes the stats by "Oh, this won't go well, so we're not even going to try", which isn't an option for human drivers, short of "don't drive at all".