I quit smoking by gradually stepping back until I got to the last 4 darts, which I just couldn’t shake. Then I moved to vaping, not trying to quit, but to be less worse for my health… Then my vape broke repeatedly in a short period and I realized going without wasn’t as bad as I thought it would be. Certainly not as bad as other methods of quitting it tried. So in this way I finally quit.
So I don’t recommend vaping as a way out really. It’s more that if you consciously realize which cigarette is your last you’re gonna freak out and relapse. It’s more that if you reduce your intake, then replace, you can step off more easily. Don’t focus on quitting or changing your lifestyle drastically, just keep taking steps. Eventually one will be the last.