Edge Case Training and Unknown Unknowns are Keeping Cars from being Fully Autonomous

“There is a huge difference between building a few vehicles to run in reasonably benign conditions with professional safety drivers, and building a fleet of millions of vehicles that have to run in an unconstrained world,” wrote Wagner in a 2016 paper co-authored with his co-founder. “It’s going to take a lot of work,” he said. But Wagner remains optimistic that we will get there—even if it takes a decade or two.