Pruitt will not leave Tennessee if he lives up to his potential. Like the others said, why leave something that you built that is working?
This is the natural ebb and flow of the league. Teams rise to the top and then fall off again. Alabama has been there for a while and will go for a topple when Saban retires. Nobody not named Dabo will want to take over a team whos boosters and fan base expect continued greatness and will consider anything less than a new years 6 bowl a disappointment. This is especially true given the trajectory of the East, Florida, Georgia and Tennessee will all be fighting for a chance to get after the West champ in Atlanta every year. Alabama will quickly devolve into a dumpster fire when Saban leaves because the pressure will crack the fan base and will kill the locker room. Good luck to whichever schmuck takes over there after the Saban era comes to a close.