Have over 2 decades as a union carpenter but I have been on dozens if not 100's of construction sites, some jobs lasting days, some weeks, some months and have worked with 100's of different people doing many different things over the years, don't think I could adapt to working at the same place doing the same thing with the same people every day.
An uncle on mine finally retired from the post office at 83 years old, he was actually playing hockey until a few years ago, still doing well but realized it was time to slow down