I don't think it's even POSSIBLE to do that.if you compare someone who's smoked a joint every day for twenty years, versus someone who hasn't
For one thing, a joint 50 years ago wasn't the same thing as a joint 20 years ago, which wasn't the same thing as a joint today.
I've been using weed for almost 60 years, so I KNOW that. It's not just something I read.
But I can only opine that if I had been smoking a joint a day of today's weed starting 60 year ago, I probably wouldn't have made it to 50 years ago. For all the tolerance and familiarity with it, I rarely smoke more than 2-3 puffs of pot in a day (evening; I don't habitually smoke it in the daytime) and more typically only one puff. Anyone smoking a joint a day of today's weed has either rendered themselves non-functional or has attained a degree of tolerance at which I can only marvel.
OTOH, I will readily defer to the opinion of any number of present company who cares to assess my mental (or physical for that matter) condition based on what I post here, and is willing to surmise how much better those functions would be operating for me, had I not fallen down the rabbit hole of The Weed With Roots In Hell.
Bring it on.
I know the difference as well. Even what I was smoking twenty years ago wasn't nearly as strong as legal weed today. If you're only smoking a few puffs a day that likely doesn't qualify as abuse. The negative effects come from abusing the drug, it doesn't sound like you've done that. It sounds like you've made intentional, informed decisions to not do that, which is what I'm recommending.