From all my reading, a lot of vapers smoke cigarettes too, or occasionally.
The thing is, while they may need to grab an analog or want them now and then, when they do smoke, it's less likely they've "fallen off the wagon."
My experience with those trying to quit using most methods is they get past the first few days hopefully, use a nicotine supplement for however long thereafter, but if and when they do smoke another cigarette, the progress is lost, and they return back to smoking full time. People who vape will try a cigarette to revisit the old style, smoke now and then, or even buy a pack, but are less likely to be "stuck" back into the habit of exclusively smoking cigarettes.
IE, you can smoke an analog and not be a slave to it all over again, with vaping as an option. No matter what, the outcome of vaping is usually positive. Vaping pretty much gives a smoker more of an option to actually smoke cigarettes if and when they want to, and not by addictive necessity. Smoking a cigarette again after being smoke-free for days or months even is not a sentence to failure any more.