If he has two, maybe three good years left, we'd be lucky.
Jason Taylor is 32 this year and Michael Strahan is 34. Abraham is only 28. So, I'd expect 4-5 years of Abraham playing at a high level. Elite pass rushers manage to play well into their thirties. Both Reggie White, Chris Doleman and Bruce Smith managed to have double-digit sack years as late as age 37. I'm not saying Abraham is in their caliber nor will he be as productive that long, but Abraham is not yet in the twilight of his career.
It's true, stopping the run has been an issue in New York over the years since Abraham began there. 3 out of his 5 years there, they finished in the Bottom 5 of yards allowed in the NFL, and only once ranked in the Top 15 in run defense (2004 where they were 5th in the league). But then again, I think when you look at the Jets personnel, it is somewhat understandable. For much of hte early years of Herm Edwards' tenure in New York, they still had 3-4 personnel left over from the Parcells/Groh days being square pegs in the 4-3 defense. It wasn't until 2004 with Vilma, along with having the horses up front, that the Jets finally got a defense that resembled a well-oiled 4-3 machine.
Abraham is not a run stuffer. But like Kerney, he definitely can make plays in pursuit vs. the run chasing from the backside. I think his impact is going to be huge, because it will allow the Falcons defense to be much more aggressive. And when the entire defense is aggressive IMO over the past 2 years, they play their best.