I used vapes to quit
After nearly 40 years of a few packs a day...even buying the most expensive mechs (rDNA) and so on saved me a fortune, too. I used some pretty strong juice - my motivation was failing lungs, after all, so fewer puffs a day was a pretty big deal.
And what that did for me was to break the habit of smoking an entire cigarette every time you light one. With strong juice, one or two hits gets it done, you put the thing down and maybe even forget about it for an hour or more (even forget where you left it - sometimes creating a panic).
The extra hassle of re wicking all the time (I used diy coils/wicks) - in my case the taste went south every couple days - was helpful too. This happens even if you have the "good stuff" with active temperature regulation and use the finest ingredients for your juice. Stuff just gets that burnt flavor...and the coil carbonizes.
After some time of this, I decided to go on a simple discipline - I'm allowed to vape once an hour, from top of the hour to 5 min after. That's it. If I miss the window, wait another hour. (you don't miss many windows, but even if you do, it's barely tolerable).
After some time at this, I found I did miss an hour - the later in the day you start, the easier that is. And one day, I went all day without really thinking about it too hard.
So I quit. Done - last March, so it's nearly a year. Yes, it now and then grabs you and shakes you like a leaf - but it doesn't take anywhere near the resolve to just say no, and I'm completely clean since last year. I don't think the weaker juice would have allowed this - I used the strongest available to cut down on the basic motor habit a lot - just didn't even want to do it that often - and that was key to the final success.
My doctor almost doesn't believe it. She says in all her practice no one else has managed to really quit for good like I have. It's been a big deal with emphysema and hypertension, quitting has added a lot of life to this old fart. Took around a year of vaping to finally taper off to the point of quitting - but my health started getting better on day one of that.
Just an anecdote, I know, but a true one by an avid observer.