But time is a factor, especially in relation to milestones. I think everyone would agree that Tesla's Autopilot and full-self-driving aspirations were going extremely well in 2016 [0], and we can safely assume that progress is still being made into 2018. The more relevant part, though, is the amount of progress relative to Tesla's earlier assumptions [1], and of course, compared to its competitors' progress.

[0] https://twitter.com/elonmusk/status/799908000689336320

[1] https://twitter.com/elonmusk/status/823727035088416768?lang=...