Tesla stock has been weak lately as investors digest early sales data and try to determine whether a drop is due to random fluctuations—or something more serious. It’s still too early to tell, but the data aren’t great.

Elon Musk, once the face of Tesla’s meteoric rise, seems to be turning his focus elsewhere just as the company faces mounting challenges. With Tesla’s sales slipping and competition heating up, investors and analysts are beginning to question whether Musk still has the passion — or the time — to lead the electric carmaker.