From a purely personal perspective, one of my relapses was after 10 years. I would keep vaping at the ready to avoid another relapse. A girl at work started vaping and quit smoking, then bragged that she quit vaping too. A week later she was smoking again. Another coworker, the one that started me vaping, said he planned to quit vaping. I argued that if we keep on it might encourage the other smokers in the shop. We need to normalize vaping to help them. If tobacco was unobtainable I'd try to quit vaping. If government cares about the kids then enforce the existing laws banning possession. They don't care about the kids of course, they are lying hypocrits.
There is a political dimension that keeps me vaping. The FDA oversees the creation of worthless drugs that are bankrupting our civilization and at the same time they are trying everything they can think of to discourage vaping which costs literally nothing and will do more good than all their pharma crap put together. To paraphrase Gil Scott Heron, "there will be no reruns brotha', the revolution, will be live."
An interesting animal experiment would be to get a monkey addicted to cigaretts then give him only the option of vaping and see if he accepts that. May be we could teach him to do DIY and rebuilding. I don't think we'd learn much but a vaping monkey would be funny as hell.