Job cuts are a tried and tested way for companies to trim costs. But when you are burning through as much cash as Tesla — more than $1bn in the last quarter alone — a 9% cull of staff does not make much of a dent. The change of tone matters more. Elon Musk, the US electric vehicle (EV) maker’s combative CEO, has been infamously nonchalant about Tesla’s lack of profitability. From his unfunny April Fool’s joke about a Tesla bankruptcy to his dismissal of one analyst for asking "bonehead questions", he can at times come across as the antithesis to schmooze guru Dale Carnegie. Musk’s apparent mission: to lose friends and alienate Wall Street. Yet in a fine display of humble pie eating, he conceded on Tuesday that Tesla needs to prove it can become "sustainably profitable". It was a startling admission and a sign that he may have finally woken up to the need to play nice. Musk needs all the market goodwill he can get. Tesla has made a loss every year of its 15 years in existence. It is ...

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