It is like family, isn't it? My son is a librarian and just got transferred to be manager of a branch, and he really misses his co-workers but is enjoying the new situation. It is a smaller branch and less stressful. When he first started working in the library and going to college to get his degree, he had a wonderful manager. She is older now and didn't want the responsibility of manager, so he is now manager at the branch where she works, and she is the assistant manager. It is working soooooo well, because she knows so much and helps him so much, and he just gives her her head and lets her do what she wants to. They interact with all the other libraries in the county system and he is happier than he has been in a long time.
In a recent survey, the "end of youth" was considered 54 years old, on average, but that number moved up with the age of the respondents.