> I had an experience (post dot com crash) where the team hired a senior engineer... who left the team within a year to be an engineering manager somewhere else in the company and our team was back to interviewing for the position again.

Same reason I struggled to get a job at McD's or Home Depot years ago when laid off. They knew I'd be gone ASAP and that I probably wouldn't eat shit the way the local rube demographic would. These are crappy service jobs but they still want you to stick it out for at least 6-12 months.