6 year Tesla owner here (Model S then Model X which is my current primary car). It is extremely rare for me to drive without AutoPilot; parking lots are pretty much my only AP-free zones. I suspect this is true of most Tesla owners; it certainly is true of the ones I talk to (friends and coworkers). From watching Autopilot, it seems to me that FSD is a long way away. HOWEVER, Autopilot is way more attentive than a human. It is not distracted by changing the radio station or AC, kids in the back seat yelling, or eating on the go. The 10x number is not surprising to me and seems plausible simply because Autopilot helps address deficiencies in humans.