We all have our addictions. Cigarettes, good wine, delicious meals, expensive toys, skydiving, hiking for beautiful views, camping under starry skies, etc, etc. So saying that people have given up one addiction up for another is, I think, a little misguided.
Personally, I loved to smoke. LOVED it. I never once felt like I needed to smoke, or at least never like I didn't want to and needed to. I never wanted to quit, it was enjoyable for me. Smoking was, for lack of a better word, a hobby for me.
The only reason that I have quit smoking and am now vaping is because it's better. Better for me, better for the people around me, and better on my budget.... well... that last one is arguable.
I view vaping as replacing a beloved hobby with a better, more responsible one. In other words: I don't think I "quit smoking," I've straight-up upgraded to vaping.