Interesting thread! I see it originated a long time ago...but the subject is still timely because "science" has obviously not completely figured out exactly how cannabis gets people high. People thought it was all about the THC for a long, long time....doesn't appear to be that way anymore
Like many people on this forum, I am old enough to know about all the old strains from first-hand experience. I grew up in the 60's and 70's. I can honestly say that I don't remember ever seeing trichomes on old school cannabis. Of course, they must have been there -mashed and compacted within the bricks...just saying' it wasn't anything like looking at the fine, undisturbed, carefully-dried/cured, crystal-coated buds of today.
Quite often, those bricked-up buds were dry...or they were moldy....either way! It was always a surprise.
-the point being that those strains were hardly ever handled properly....and yet....
..the flavors were there....heavy blueberry, skunk, caramel, moss, etc. -each distinctive in its own way -as in
VERY distinctive.
And I can also say, from experience, that I have sampled several strains reported to be over 30% THC. So, IF the potency was just due to THC, then I should be able to feel a more intense effect from smoking it. Fact is, it's just not so.
Could it be that those old school strains were receiving something from their native soil?.....from the angle of the Sun?...from the local water supply?
But wait!....
IF that were the case, then how is it that most of the old school,
homegrown cannabis we had back then -grown under fluorescent shoplights or MH streetlight bulbs was just as ( or, even
more) potent, too?
So, if it wasn't the native soil, etc., and if it wasn't the light...then it must be the genetics...right?
What happened?
Breeders looking for "stealthy", less-skunky-smelling strains were selecting for all the traits that made it easier and less risky for them. They selected for less recognizable smells or for light-smelling (thus, low terpene producing) phenotypes. They selected for shorter, fatter growing strains for the same reason -stealth and convenience of production. This meant breeding more Indica traits into strains. These Indicas had different effects than strains coming from South of the border that we had gotten used to smoking. As time went on, everything became a hybrid. Sometimes, hybrids produced chemical profiles that worked together....but other times there seemed to be a "push/pull" effect going on where the uplifting aspects of the Sativa traits were attenuated by the more sedative properties of the Indicas...and visa-versa.
A lot of what's out there now is just a bunch of mishmash that's hit-or-miss depending on the combination of strains and how good of a job the grower did with it. Girl Scout Cookies, for example is a strain that stood out from literally thousands of strains. Chemdawg was another one from earlier times, too. With all the supposed great genetics out there, you would think it to be hard to go wrong with almost anything. In reality, most of it is completely unremarkable and ends up being a kind of psychological version of the story of "The Emperor's New Clothes" -meaning that no one wants to really admit that their weed, with all of its "bred-for-high-THC" qualities, doesn't change the fact that old, landrace strains with their relatively lower THC levels are still more effective.
The only solution I have found is to grow strains from regular seeds and hope I find one of "THE" strains that recalls some (or all) of those old properties. In any case, growing is a kind of rewarding "high" of its own and that will have to suffice until I meet someone who has kept a pure line of breeding for the last 40-50 years.