The first hints were when deals and discounts started to appear. Tesla was among the first, dramatically chopping the prices of its hugely popular Model 3 and Model Y electric saloon and SUV models. Back in March, when these cuts were made, Tesla’s oft-controversial boss, Elon Musk, said that the price cuts were about passing on efficiencies in production to customers. A Tesla spokesperson at the time said: “Our focus on continuous product improvement through original engineering and manufacturing processes have further optimised our ability to make the best product for an industry-leading cost. We have observed a normalisation of...