Not sure if you have been Keeping Up with Current Affairs? But the Concept that
vaping will somehow be "left alone" seems Beyond Naïve.
And I have News for you Sunshine, as Teen e-Cigarette use increases, you will see More and More Restrictions on Adult Use by States and the Feds. And Less and Less non-vaper support by General Public and Legislators.
As for Citing a Basis. Don't need to. Because just like the Idea that Teen Smoking Rates can fall at 17% forever, my Conjecture is the same as your Conjecture.