The word "just" is doing a lot of work there. Going by that logic: We "just" need to figure out cold fusion to have effectively infinite energy. We "just" need to develop warp drives to travel across the galaxy. We "just" need to figure out the chemo problem to cure cancer.
> MUSK: Yeah. But I think self-driving cars is essentially a solved problem at this point, right? And Tesla’s rolled out a sort of robo-taxi service in a few cities, and will be very, very widespread by the end of this year within the U.S. And then we hope to get supervised full self-driving approval in Europe, hopefully next month.