My oft-cited example is my dad. He probably started smoking at age 15 and smoked continuously during his first career working life, usually from just after breakfast, and all day at work, until bedtime, with time out for meals.
He owned one fully functional pipe at a time, with maybe a near burn-out as a back-up, and smoked only Granger from the foil pouch.
He quit smoking cold turkey at age 65 to take a job at a non-smoking campus.
He lived until he was 89, well into his 90th year, and remained licensed to drive without glasses his entire life.
During his smoking years, he did a few years without the pipe, when he smoked on the same schedule with King Edward cigars, and then he went back to his pipe.
None of his ailments in his final years related to smoking that he or his doctors knew.
None of this means that I (or anyone else) will be as lucky, but that was his experience. He had good genes. His grandfather lived into his nineties, as did his aunts. All were ambulatory and active most of their old age.