Tesla delivered a shock this week when word leaked out CEO Elon Musk was effectively closing down several departments, including the one overseeing its Supercharger network. Set up in 2012, when the automaker launched its original Model S sedan, the charging system was meant to assure buyers they’d have a place to plug in. But with the Supercharger network now open to most competing EV manufacturers, the news has triggered concerns across the auto industry — and is leading Tesla rivals to put emphasis on the competing new Ionna charging network.