Elon Musk thinks Tesla could be worth more than the next five most valuable companies combined one day, thanks to autonomous driving and robotics. However, Tesla stock plunged 47% from its record high,

A sobering quarterly report puts more prssure on Tesla’s chief executive to make good on his promises for fully autonomous vehicles.

Musk’s management style has always been a lightning rod. His focus on speed and impatience allows him to advance technologies at a breakneck pace.