An anonymous reader writes: In a new interview with Fortune, outspoken Tesla CEO Elon Musk said the electric automaker is just two years away from developing fully autonomous vehicles that can operate ably and safely in any type of environment. While Musk has long championed an automotive age filled with self-driving cars, this is the most optimistic timeline for their deployment we've seen Musk make yet. In fact, Musk in 2014 said the requisite technology to manufacture a self-driving car was still about five to six years away. "I think we have all the pieces," Musk said, "and it's just about refining those pieces, putting them in place, and making sure they work across a huge number of environments—and then we're done. It's a much easier problem than people think it is."