My Dad quit smoking when he was 62 years old.
He was diagnosed with cancer when he was 66 years old and went through numerous treatments … surgery, radiation, hormone replacement and was declared "cancer free".
He passed away from cancer when he was 72 years young.
The last full year of his life (cancer returned) he had weekly chemotherapy treatments. If you have difficulty quitting or staying quit I suggest you spend some time in a Chemo Room.
I miss him. I always will at times. I don't miss seeing him suffer. Those of us that have walked the path with someone at the end of their life due to cancer (I have done so more than once) cannot ever forget or not see what we did while helping them transition from this world. It changes you forever. It is not a "natural" movie maker's ending. Trust me.
If you are still smoking … please stop.
If you have already quit … stay that way.