People say that weed in the 70's wasn't that potent compared to what's out there now, and in some cases that's true. There is some crazy potent weed out there today. But most of it is pretty average. Today's really potent stuff is very expensive and isn't always available to the average person.
And we had really good stuff back then, too. We used to get stoned as hell on a relatively small amount.
Two or three people could get high as kites on one joint. Four or five could get stoned out on two joints.
I have no complaints about the potency of the weed we smoked in the 70's.
Plus, back then we used to get a lot of hash, too.