Tesla plugs older Model S as new buyers turn to Model 3

By Alexandria SageSAN FRANCISCO (Reuters) - Electric-car maker Tesla Incon Wednesday reported first-quarter revenue that more than doubled, and while saying the upcoming Model 3 was on schedule for July, it downplayed the mass-market vehicle to give a sales pitch for its more expensive Model S.Chief Executive Elon Musk's bold approach to cars, space exploration and clean energy has fueled investor enthusiasm for Tesla."We have seen some impact of Model S orders as a function of people being conf