For me, I smoked 2 packs a day, either while driving big trucks (makes the time go by fast) or when home DJing (chain smoking, drinking, etc.) and found myself getting treated with bronchitis every 45 days. I tried quitting with a PV, but just not enough nicotine delivery for that. So I quit successfully with Chantix then 3 weeks later, missed not the nicotine but just having something to break up the day. I missed the smoking experience. Tried vaping again and really enjoy it now with the reduced nicotine and all the fun flavors. I don't have those "gotta-get-out-of-bed-and-have-one" feelings anymore because the peaks and valleys aren't as big. My addiction is now small and I feel like i'm in control of it, not the other way around.
Now, I'm healthy, clothes don't smell, I've got money in my pocket and don't have the monkey anymore. I can go out and have a few drinks without the desire for an analog. To me that proves i've made the right decision. And I can puff on the PV while out and get the same experience, so i'm not missing anything.
The best part is that i'm a scuba diver and lung function and capacity changes everything. As a smoker over 40, I found myself ineligible for expeditions, and other things like cave diving would be off limits. Now, I can resume doing the things I love without the fear of putting myself or others at risk due to compromised lung function. I can metabolize oxygen and nitrogen correctly now and won't have to worry so much about decompression sickness and heart function. Vaping makes 100% sense to anyone that dives. This summer i'll be able to ride my bicycle again, which hasn't been any fun for years as a heavy smoker. And i'll be diving again.
As a bonus, my wife says I "taste better" lol if you know what I mean.