Comment by dns_snek

Counter-point: For someone who's used to smoking or vaping, the craving to "take a puff" can be a very strong, maybe stronger than the chemical dependence on nicotine itself.

I noticed that in myself when I was trying to quit, vaping nicotine-free liquids helped my cravings more than nicotine itself. It didn't help the physical withdrawal symptoms but it mysteriously stopped the cravings for a while.