But there are plenty of documented cases where heavy smoking for around 30 years = cancer. I have to wonder if cigarettes of the 50s are different from the cig

But there are plenty of documented cases where heavy smoking for around 30 years = cancer. I have to wonder if cigarettes of the 50s are different from the cigarettes of today. Perhaps, for example, some additive(s) not present in the 50s cigs are causing cancer in today’s cigs. Also, “hard-smoking” is subjective. Are the heavy smokers of today smoking more than the heavy smokers of the 50s? Speaking anecdotally, all four of my grandparents smoked, all four died north of age 70, and all four died in very unpleasant, smoking-related ways (essentially suffocation, all four- COVID, COPD, pneumonia, and I’m not sure about the fourth). So I guess my final point is: is it really a “win” if smokers “usually” make it to old age?