Some quick napkin math: 3 million miles a day gets you 6 billion miles in 5 and a half years (not counting the ~100mm miles they already have). Since the dail

Some quick napkin math: 3 million miles a day gets you 6 billion miles in 5 and a half years (not counting the ~100mm miles they already have). Since the daily mileage rate will only be growing exponentially, it's not unreasonable to assume that Tesla hit this number in under 3 years. Not sure how they came up with 6 billion as the magic number, but if that's accurate, that's very soon. It also helps that there are no real government stakeholders in preventing the proliferation of self-driving cars. People just need to generally believe that they are much safer than human drivers, which of course is not true yet.