[who_is_firing]

I think my overall argument was that we have barely studied studied e-cigarettes so OP's assertion "Vaping has been pretty well studied (except for the flavorings" is false.

You are correct that it's entirely possible that e-cigarettes are not in the same magnitude of impact as tobacco. However, it's also possible it may be just as bad. The research is too early stage. What I do know (anecdotally), is that most of the researchers in the field have a gut feeling that it is a large issue. Specifically, early findings are showing the product has convinced an entire new generation of teens that vaping is cool even while they believe smoking is gross. It is reseting the gains made in the 80s and 90s on reducing teen addiction to smoking. There is also research to indicate it has a strong impact on health. Probably not as strong as tobacco, but if you are more likely to use it as a teen because you perceive it as healthy and cool, the net effect on public health is just as bad. i.e. the individual effect might be less, but the overall net effect on society is more since its a more compelling product (for young people).

We are probably 5-10 years from knowing with solid peer reviewed research of knowing whether vaping is more like eating a few donuts a day or whether it's closer to smoking a pack a day.