Will Elon Musk's 120-hour week stop us worshipping workaholism?

Last week, an emotional Elon Musk described how he was working so hard to keep production of the Tesla Model 3 on track that he missed his own birthday. "All night – no friends, nothing," he told the New York Times, apparently "struggling to get the words out". Musk had, he said, been working 120-hour weeks, often not leaving the factory for three or four days. When he did get home, he said, the choice was between no sleep or taking an Ambien, an insomnia drug intended for short-term use (and blamed by some of Tesla's board members for his erratic night-time tweeting). Musk has long been celebrated by the business press for his work ethic.