My good friend worked on the landing faring (those strut things that flare out when it gets near the ground) for the Falcon 9. He said it almost killed him. Now he builds decouplers and other mechanisms for planetary rovers and enjoys it just fine.
One of the members of my group just left for SpaceX last year, because he just wanted to work somewhere else for a change. He was one of the better FSW engineers we had seen, and I'm sure he's helping SpaceX do great things!
Another friend of mine went off to Amazon to oversee their warehouse automation.
And we just hired a bunch of really stellar folks from NG who were fed up with their workplace. They seem to love it here.
It's an industry. Changeover is pretty normal.
