Ask HN: I'm changing my job after a 15-year tenure. How should I proceed?
When I've seen "old hands" change jobs, the thing I often see them struggle with is the psychology of no longer being the domain expert. People underestimate how much deep knowledge they possess that is specific to their company. The longer the tenure, the more this is true. And most/all of it will be useless at a new place.This is not a bad thing. And it is a good thing to branch out and see a broader perspective. But it's hard to prepare one's self going from being the person that knows everything about everything to being the person that knows nothing about anything.