My dad just turned 87 and still smokes. He hid it or cut down a lot before my mom died, but I don't think he's ever stopped.
He had a "mild" heart attack a couple of years ago, got 2 stents, as well as stents in the legs. Other than that, he has arthritis and has been living with prostate cancer for 20+ years.
No lung cancer, COPD, etc. He's very active (well not sports wise) and sharp in the mind.