I was once the tech lead of a 4-person team of programmers. One person quit to go be a middle school math teacher, a second to move to another city, a third to

I was once the tech lead of a 4-person team of programmers. One person quit to go be a middle school math teacher, a second to move to another city, a third to move back to his home state, and then I quit to move into a different area of work (and ended up moving out of state a few months later). When I gave my notice our manager was baffled, and genuinely wanted to know if it was something he'd done that had driven us all away. There wasn't. I don't have any idea what happened in this case. Perhaps all those people moved to other groups at Google or got recruited to startups. Or perhaps that group's manager was a jerk and everyone left to get away from them.