With Chip Kelly apparently a hot NFL coaching commodity I gotta ask, why aren't people talking about Nick Saban?

I know Saban has already done a stint in the NFL as a head coach and it wasn't the best (but it really wasn't the worst performance), but with another potential National Championship, I gotta ask what does he have left to accomplish at Alabama? At a certain point a guy like Saban has be saying, "Know what? I think I want to try the pros again, crystal footballs are getting boring, I think I want a big silver football on a pedestal". I mean people are talking about Chip Kelly like he has nothing left to accomplish in college football yet he's only won a Rose Bowl, not (potentially) multiple national championships. Given Saban's personality I think he has to want another challenge.

Additionally I have to think that both Saban's record and his style of coaching would make him a very interesting prospect for a variety of owners. Nick Saban has experience as pro coach, he's coached dozens of players who gone to play in the pros, and he coaching style is much more suited for the NFL say than Kelly's.

It's not like this kind of career move would be unprecedented either, look what Pete Carroll did, (ok, so he might have been fleeing a sinking ship but I think kinda just provided him an excuse to get back to the pros).

Is there something I'm missing? Does Saban just love college football so much more that he'll just stay forever? Is there such a big flaw with him that pro owners wouldn't want him?