In my experience many of the people who haven’t quit are self medicating for attention or depressive reasons. Of the folks I know who vape about half were diagnosed with ADHD later in life (30+) and quit after finding a stimulant medication that worked for them. The rest are unmedicated and self medicating with nicotine and coffee or energy drinks. Self medicating is overlooked in virtually every discussion about nicotine and I’d like to see it considered more often when the topic comes up instead of just leaping straight to “nicotine use bad” or “nicotine users should be punished” like most discussions do.

Edit: there’s also some interesting research re: nicotine’s neuroprotective properties that gets lost in the prohibition fervor