I will slightly disagree. IMO, at some point in time, someone's ego will eat one's brain. Continued

success at this level of football is a powerful demon if left unchecked. Someone------Saban, Day, Dabo, etc.-----will reach that stage of "I am bullet proof" and the dominoes will begin to fall. It's happened before at places like Baylor, USC, Ped State and I'm sure a few others. A tipping point is reached in any number of ways----bribes, academic cheating, legal trouble for players or coaches, steroid scandals are a few----that causes the Goliaths to begin falling. It could start in one year, three years or ten years but something will happen to change the course of of a program's success.