Just one?

I smoked for almost 20 years. I lost track of how many times I tried - and failed - to quit. Last December I just felt done. Put it down and haven’t gone back to it. I even had a few cigarettes while out with a friend in March and had no desire to go back to it after. I know a few other people who quit like that, but far more who have struggled with it for years and still smoke.

I have no idea what changed for me. Every other attempt failed, even if I felt really ready to quit.