What they gain is hours on the road, real-life driving data. That's invaluable for tuning of machine learning systems like this one. They've also, FWIW, gained

What they gain is hours on the road, real-life driving data. That's invaluable for tuning of machine learning systems like this one. They've also, FWIW, gained quite a bit of positive press. https://www.youtube.com/results?search_query=tesla+autopilot+saves+life https://www.youtube.com/results?search_query=tesla+autopilot...