[chc]

It was 140 million a year ago[1], and 222 million last October[2], so I guess a conservative estimate would be 600 million miles on autopilot (assuming that's about two months of change and usage remained steady).

[1]: https://www.wired.com/2016/08/how-tesla-autopilot-works/

[2]: https://twitter.com/elonmusk/status/784487348562198529