Yeah most winning coaches actually have longevity in their career. Lippi, Del Bosque, Ancellotti, Pep, even someone like Mourinho who won with defensive football. We don't see people calling them with Pep 2.0 or Ancellotti 2.0
Allegri is really curious case, he won a lot but then declining really fast.
Was he really great manager or just lucky he had great squad that make him look better?
This is actually genuine question but if someone asking, terms like rewriting history will be thrown around.