SpaceX CEO Elon Musk on Saturday expressed optimism for rival rocket maker Boeing Space (NYSE:BA) under its new CEO, hours after NASA announced that the astronauts who went to space aboard Boeing’s Starliner would return via a SpaceX vehicle. What Happened: “The new Boeing CEO is spending time in the factories. That is the right thing to do,” Musk said. The new Boeing CEO, Kelly Ortberg, took the reins of the company from Dave Calhoun earlier this month. Ortberg then said that he would be based in Seattle, close to the company’s manufacturing facilities inRenton. Musk’s comment on Boeing comes…