I smoked every day for years, quit ages ago. I don't feel any permanent impairment at all. Having known a lot of older daily smokers (decades) and older alcoho

I smoked every day for years, quit ages ago. I don't feel any permanent impairment at all. Having known a lot of older daily smokers (decades) and older alcoholics, alcohol is a lot more damaging, both mentally and physically. I've never seen anyone die in their 40s from marijuana, but I've seen a few people eventually lose that battle with their liver or their kidneys from alcohol. Older alcoholics can be almost shockingingly stupid, too - far worse than young alcoholics.