Most adults who didn't smoke as teens never pick up the habit. Smoking lives on through peer pressure - something that matters less and less as a person matures.

It isn't shown as "cool" in movies like it used to be, so adults who are "set in their ways" are lacking most of the remaining peer pressure tactics that typically works for adults.

Wait for vape scenes in the movies. You can be reasonably sure there's a lobby group working towards it. How about a "FBE Teens try different healthful Vape Flavours"?