Obviously Carmine Persico would never flip.

Merlino and Barney are the only younger guys I can think of who wouldn't.

I'm sure very few of the leader sin any family would.
These guys(Joe Massino) who flip when they are so old are a ****ing disgrace. I can almost understand a young guy flipping, but these guys 60+ who do are just horrible people. I can only hope there really is a hell for people like them to burn in some day.