The most popular vehicle in the US is going electric, and it’s coming to dealers across the country. The first demo models of the Ford F-150 Lightning, an electric version of the best-selling pickup truck, have begun trickling out to dealerships, and a few vehicles have been delivered to the first customers on a very long waiting list. Starting at $40,000, the F-150 Lightning may steal some thunder from Rivian, the EV truck manufacturer that stumbled out of the gate with a slow production ramp-up. More broadly, the Lightning is being heralded as a potential game-changer for electric vehicles, …