I think the ecconomics of vaping is just as important as the health benefits. The smoke in one cigarette exposes a smoker to 1 mg of nic. A one liter bottle of 100 mg nic has 100,000 mg of nic, the same as in the smoke from 5,000 packs of cigarettes. I used to pay $6 a pack for cigarettes, 30 cents per cigarette, so 30 cents per mg of nic. If the nic in that 1 liter bottle were priced the same as the nic in cigarettes it would be worth $30,000 where I live. Cigarettes in Chicago cost twice as much so the same bottle is worth $60,000. One more comparison. Gold costs $1000 an ounce. The nicotine in the smoke of cigarettes costs $8,400 an ounce. The nicotine in the $50 bottle I buy from myfreedomsmokes costs $14 an ounce.
May be it's fair to say our governments got greedy and over taxedd cigarettes. Now there's competition that costs less and doesn't make people sick and they want to interfere with smokers switching to vaping as though they are ruthless drug dealers protecting their business.