I doubt we will see much research on the potentiation effects of tobacco on nicotine, since broadly it seems as if tobacco is "on the way out", so to speak.
However, there is quite a bit of research available [0, 1] that suggests that an addiction to one substance can prime the brain's neurological pathways to more easily become addicted to a second, unrelated substance.
By reducing the use of addictive substances overall, it might produce some decrease in addictions to more damaging substances (i.e. meth, heroin, etc).
Of course, the same argument could be said about alcohol or caffeine, and I don't think we're likely to see those go away any time soon. However, I think that's a false dilemma fallacy, as we're much closer (in % of population, at least) to reducing the use of nicotine than either of those.
[0]: https://harvardmagazine.com/2000/03/deep-cravings.html
[1]: https://www.nature.com/articles/nn1578
