> There is a theory in the vaping community, or maybe its an urban myth, that the lack of MAO inhibitors is what allows people who vape to essentially lose their addiction.

Definitely a myth, I never smoked but vaped for 2 years. I quit a few months ago because I was vaping so much I noticed some pretty bad side effects, the increase in blood pressure was real. Nicotine is highly addictive, I still feel like I want to do it and it takes willpower not to go back to it.