For much of last year, established automakers like General Motors and Ford Motor operated in a different reality from Tesla, the electric car company.G.M. and Ford closed one factory after another — sometimes for months on end — because of a shortage of computer chips, leaving dealer lots bare and sending car prices zooming. Yet Tesla racked up record sales quarter after quarter and ended the year having sold nearly twice as many vehicles as it did in 2020 unhindered by an industrywide crisis.Tesla’s ability to conjure up critical components has a greater significance than one year’s car sales. It suggests that the company, and possibly other young electric car businesses, could threaten the dominance of giants like Volkswagen and G.M. sooner and more forcefully than most industry executives and policymakers realize. That would help the effort to reduce the emissions that are causing climate change by displacing more gasoline-powered cars sooner. But it …
