Tesla's ambitious Robotaxi reveal took place earlier this month at a Warner Bros backlot in Hollywood. The event showcased a driverless coupe with no steering wheel and no pedals that gave attendees rides around the studio. It was a spectacle, but there was a problem. There was a lot of "wow," but not a lot of "how"—and that's not enough for big investors who value Tesla's stock price on the company's ability to solve self-driving.
