Comment by simoncion

You:

  Only about 6% nicotine users manage to quit every year.

Your linked article:

  Yet, only about 6 percent of smokers are able to quit in a given year.

Other than when it talks about prescription smoking cessation tools, the article does not mention anything other than tobacco smokers. The last paragraph of the article actually discusses the observation that the ritual of smoking often provides substantial behavioral reinforcement to the smoker who is attempting to quit smoking.

I also note that I was able to quit nicotine cold-turkey after smoking cigarettes for two years. I've never been able to quit caffeine... and -although it is notably shorter in duration- caffeine withdrawal is WAY worse than nicotine withdrawal.