[TeMPOraL]

SpaceX is not your typical company - it's a vehicle created to instantiate an idea (getting humans to Mars and beyond), and not a specialized instance of a generic Company class with a Product parameter set to Rockets. That is, people who work there are the ones who believe in the idea; for them it's more of a vocation, a life itself. Those who don't fit that bill burn out pretty quickly - hence the turnover rate.