I wonder how much this phenomenon varies from one addictive substance to another. For example, obviously there are a lot of people who remain addicted to tobacc

I wonder how much this phenomenon varies from one addictive substance to another. For example, obviously there are a lot of people who remain addicted to tobacco long past their mid 20s. Also, is it possible that some of these people who are considered to have grown out of their addiction, simply substituted one addiction for another? I've heard that the rate of tobacco use among recovering alcoholics is very high. It's true that they're probably better off being out-of-control smokers than out-of-control drinkers. OTOH, I wouldn't say such people have really grown out of their addiction.