Vaping can be difficult to stop because:

- it's more accepted

- it's smoother on the throat, and there's plenty of tastes.

- there is no "dose", if you want to you can just vape non stop, and you can pace yourself. With a cigarette, you can't smoke slowly, or you'll loose half the cigarette.

All in all, it's just more convenient and cheaper to vape. If you're hooked, I can see it quite a challenge to stop. You can always say : "oh I am just taking x drags a day".

Personnally I didn't like vaping much, cause it was the beginning, the tastes were weird, the gear was not great battery-wise. So I kept going back to smoking. Eventually going cold turkey from cigarettes was way easier than through vaping.