Comment by userbinator

It would be fascinating if someone could live a long life despite smoking so much

Genetic variation probably has a bigger role than we'd like to admit. There are definitely outliers. I know smokers who lived into their 90s, and non-smokers who died much younger. The sibling comment says they lived into their 70s, which is probably average.

...and then there's https://en.wikipedia.org/wiki/Jeanne_Calment#Health_and_life...

Calment continued smoking in her elderly years until she was 117