I don't have any insight into the values themselves, but each of those are going to have such variances as to make any simple summary useless. Products just to

I don't have any insight into the values themselves, but each of those are going to have such variances as to make any simple summary useless. Products just to get people to stop smoking are a huge market and many people fail in their attempts to quit. But many people never get hooked in the first place, and even long-term smokers stopping cold is not that uncommon. For alcohol, I've never known a non-problem drinker who couldn't give it up at any time (for weight loss, Lent, personal challenge, avoiding prescription drug interaction). Similarly, my understanding is that heroin is incredibly addictive for some people but not others.