I did this exactly too, swapped to vaping about 10 years ago and lowered the nic amount to 3mg for years. Finally decided to put it down in 2023, switched to 0 for 2 weeks and quit for ever. I smoked for over 20 years and tried to quit so many times, used everything, gum, mints, patches - vaping was the only thing that helped me. Its a shame that its just the new cigarettes now.