I'd quit vaping if it was proven to be worse for me than smoking tobacco cigarettes. I found it was easy to quit tobacco with e-cigs and find that it's actually quite easy to put down my mod for several days at a time even though I still use 12mg Nic. Where as with traditional cig's I would smoke all day long, with vaping I find it pleasant if I'd had an alcoholic beverage but no longer have any feelings of need to vape after a meal, or before bed or when waking up in the AM like I use to with tobacco cigs.
However, it's EXTREMELY unlikely that I'll ever go back to smoking tobacco cigs again, I just really really enjoy being able to put my hands near my face during the day and not stink of stale tobacco, and walking into my closet at home and not smelling the rank smell of stale tobacco on everything I own, and not having to wash down the white painted walls in my home because they've turned yellow from smoking. So, Nope I'd not go back to smoking tobacco even if I felt I had to quit vaping.
I smoked tobacco cigs for over 30 years and really don't have the desire to ever go back to them again. Now I stand in line at the grocery store and there's only one kind of person that I find it acceptable to smell like smoke, when I'm standing behind the blue-haired 89 year old grandmother that smells like a combination of Rose water and tobacco. For some reason it doesn't bother me, but when I'm behind anybody else and they stink like tobacco I'm just thankful that I don't stink like that anymore.