did you both quit for real or replace cigarettes with vaping while still getting your nicotine fix? There is a big difference there. If you just swapped out one for the other you didn't really quit. You went from one form to another. No more than somebody switching from 2 cans of coke a day to 5 glasses of good old fashion southern sweet tea a day cut sugar out of their diet.
The problem with this line of thought is that you're demonizing nicotine. At least at the levels humans ingest (or inhale) at, its virtually harmless.
Keep in mind that I did not say that vaping is harmless. Its not. Its just far safer than a cigarette. I could toss out a mountain of links to research and I'm sure you can do the same to prove the opposite. Then we can argue what data is BS and what isn't.
There's one thing that I find interesting though. The main cancer causing agent in cigarettes... Is radioactive alpha particles. This causes about 2/3 of lung cancer in smokers.
And here we are worried about flavours. How about worry about keeping it out of the hands of children? We don't seem to want to ban tobacco for this.