As an ADHD-diagnosed person, to function properly I need some sort of a stimulant. It's really "choose your adventure" kind of a situation - I need either sugar, ritalin or nicotine, and the less I take of one the more I need of another to function properly.
Keep that in mind when you see someone smoking - unless you're 100% sure that they are neurotypical, you don't know if it's addiction or self-medication.
Then this new nicotine delivery method comes along, smokers try it, and find it an acceptable substitute.
The "they" above is me. I switched a couple years ago and have had nothing but improvement in my health. My stamina is better, my chronic cough went away, and I don't hear that faint whistle when I breath in.
I'm sure if and when I give up nicotine completely, I'll feel better still. But right now I'm taking this partial win.
(For those who can't listen to this right now, it's a short Mitchell and Webb radio sketch that humorously illustrates that it's quite difficult to stop an addiction simply because you know it'd be good for you.)