I do vaping for 6 years. But only “classical” (RDA with 3mg liquid). And I noticed that I’m addicted to clouds of vapor and its flavor, rather than nicotine. If you change my liquid from 3mg to 0mg without telling me, I’m sure I won’t figure this out. There’s a true story about cigarette smoker. One person was addicted to smoking, used to smoke something like Marlboro Red. His friend convinced him to switch to vape. He gifted him vape and liquid, telling it’s the most high nicotine liquid. A month later smoking person said “thanks, I’m only vaping now”. Then his friend told him that he cheated on him, and all that month he was smoking 0mg liquid.So nicotine is more about in our mind.