Tesla has built its 10 millionth electric vehicle, according to a social media post by the company early on Thursday. The milestone comes six years after the company built its one millionth vehicle. Despite a few years of intense growth on the backs of the Model 3 and Model Y, Tesla has not been able to sell 2 million vehicles in a single year. Musk used to promise that Tesla would make 20 million cars per year by 2030, but he abandoned that idea a few years ago as the company’s sales slowed down. Still, of the four product goals, this is the one Tesla is closest to achieving.