I think there's one goal left that Saban would like to achieve and that would be to pass Coach Bryant in number of career wins and also wins at Alabama. Right now Saban is 50 wins away from achieving both. If we throw out Saban's first season at Alabama he's been averaging 12.5 wins per season, so in 4 more years he could pass Bryant and most certainly would do it in 5 more. Saban would be 75 at that point and would have achieved every goal an Alabama HC could hope for so that's when I think he could retire, unless he still feels good and if Bama is still among the top 2 or 3 schools in recruiting he might try to go a bit longer.
I know people are wired differently, so keep that in mind - this isn't a rant...
I understand Saban's description of his career - it's not about winning, NCs, surpassing records, etc. - he simply loves what he does and will continue to do it until he no longer brings value to the team. I'm the exact same way in my career - I plan on doing it until I simply cannot, I've ZERO interest in retiring.
If you listen to Saban, he's said over (and over and over) that he'll continue coaching until he cannot bring value to the players. That doesn't stop when he wins another NC or breaks some record. It happens when he feels he's lost the energy to continue the process at the level required to help the players be the best they can be.
Unless he's a liar or his health deteriorates rapidly, I cannot see him retiring in the near future. And that's not wishful thinking, that's simply taking the man at his word, something he's stated multiple times and as recently as a few months ago.
So while threads like this can be fun, I think they're more of a shot in the dark than any of us can know, as it literally wouldn't surprise me if Saban continued coaching until he's 80. He's found what he truly loves to do and will do it until he cannot do it to his own (high) standard anymore.
RTR