I stopped 6 years ago and have zero cravings. But I am curious how you define "cravings". Is it a physical sensation? Is it a mental "pull" when you see someone light one up?
It's associative. If I think about smoking I get a strong urge to do it. I stopped the first time I noticed the craving when seeing someone I did not know smoking and had the urge to bum a smoke.
I smoked less than 3 packs of cigarettes in my life, stopped 15 years ago, and I still get cravings. Alcohol on the other hand has zero pull for me.