That very well could be the case. Saban is very demanding of his assistants, and works them hard. Yes, he does tend to have a high staff turnover, but there are also a lot of coaches who WANT to work for him. Some coaches like Will Muschamp and Jimbo Fisher loved working for him. Working for him is not for everybody. His drive and relentlessness is what makes him the coach he is. He's probably the best recruiter in college football, and one of the best defensive minds.