Anecdote warning, but I'm 38 and completely switched methods of nicotine ingestion over just a couple of days. I knew I liked the mild stimulant effects of nicotine. I knew they helped immensely with my ADHD symptoms. And I knew that stopping use would suck (both in terms of the temporary withdrawal and the longer term lack of something I knew existed that was desirable).
So when vaporizers improved to the point where I could use one dependably and reliably, I switched in the time it took to finish my last pack of smokes. I'm well aware that sucking nicotine mist with a bit of glycerine and and even tinier amount of food-grade flavoring is less healthy than breathing only fresh country air, results of every chemical analysis I've read (made with a good device, properly used, and with good quality liquid) show me that I'm getting the "active ingredient" with drastically less risky compounds than the inhaling of burning leaves. The less-healthy stuff that is in it is found in much lower levels than in cig smoke.
Regardless, not trying to be one of "those guys" and I typically don't go out of my way to even talk about this stuff because nobody has any reason to care about my personal conclusions about addictive stimulants.
At the same time, of every adult I know who uses a vaporizer, none of them smokes more than a cig/cigar or two per year anymore and the vast majority lose their taste for smoking after the first few days getting used to the less immediate dose from nicotine vapor versus combusted tobacco.
(also teenagers can't legally buy nicotine solution either. Never stopped them with cigs but I don't know any teenagers currently so I can't speak to their nicotine use or preferred delivery methods).