Someone really needs to invent the quit smoking vending machine Bruce has in that movie where the cigarettes just get smaller and smaller with bigger filters. I feel like that might actually work because theyd slowly get less satisfying and harder to smoke. A significant enough gradient would be required--not pictured in the movie.
Discussion
I remember in the 70s my grandmother had something that reduced the amount gradually. iirc it was a set of holders with different filters.
When I quit one of the most difficult things was not hanging out where people all smoked on breaks at work. My friendships changed.
I think I found an old picture of her: 
I used to watch that cartoon.
iirc what my grandmother had was a long box with say 6 different short filter holder things.
Fancy. I remember my grandma had a fancy cigarette case I loved playing with. That women got lung cancer twice and still never stopped. When she went in to have a lobectomy, the doctor was like "your lung is just a lemon sized lump of cancer, I have no idea how you're still breathing." Really something. She was a neat person.
my grandparents both died of lung cancer. in the end they used to smoke a half smoke under the kitchen hoof fan.
I can't imagine either of them not smoking.