Because a car can pull over and stop if something goes wrong.<p>Google is covering tens of thousands of miles in autonomous mode every month [1], and Tesla is refining their algorithms and mapping data with every mile Tesla Model S owners drive (whether they&#x27;ve paid for Autopilot or not, the vehicle just needs to have the hardware).<p>Hockey stick and all that jazz.<p>[1] <a href="https:&#x2F;&#x2F;www.google.com&#x2F;selfdrivingcar&#x2F;reports&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.google.com&#x2F;selfdrivingcar&#x2F;reports&#x2F;</a>