What I mean is, there will always be some hard drug users, now from the discussion I understand some "hard" THC products exist, will this result in any kind of demographic change like the OP worried about, or is it just a new drug of abuse?
Just because these things exist, I don't think it automatically follows that they will get used by most people, or even more people than would have found some other destructive thing to do in their absence
The availability of vape pens also makes it REALLY easy to end up smoking way more than you would otherwise and as an easy way to start smoking in general. I smoke and enjoy the convenience of pens but they are perfect tools for increasing cannabis consumption in a population.
It is almost as if flower based cannabis is a gateway drug to these concentrated forms and I think it is really easy to go down that path as an already regular user. It's more economical, potentially better for you (less smoking) and now very easy to obtain.
I think the "overton window" of cannabis use is being shifted to the heavier end. Casual users will probably stay about the same but regular and heavier users will all shift to more or higher potency consumption.
Technology has massively changed how people consume cannabis - many people today may have never rolled or smoked a traditional joint ever. You can buy it in ready to load resin cartridges powered by a LiIon battery. Many of these things produce cold vapor that makes it staggeringly easy to smoke an enormous quantity. At least with a joint, there normally comes a point one's throat will probably not thank you for continuing... The cold vapor from many vaporizers is almost odor free too, meaning people can consume in places they couldn't previously.
The concern for marijuana is less about the toxicity of it as a substance, and more the psychological effects of being high.
Then I started smoking pot. And I experimented with a ton of hard psychedelic drugs. And it absolutely took a toll on my cognitive abilities. But it had a much more profound effect on my personality. A positive effect. Especially LSD.
It was like a light switch went on in my personality. I suddenly was much more "tuned in" to the world around me. I became mindful and considerate. My judgement faded. My outlook had changed to one that was seriously more healthy. Today I don't drink or do hard drugs. Just Marijuana. And I'm happy with myself.
I don't know what to make of that but I do know that I've seen things and felt things and understood things from perspectives that people who have never taken drugs can literally not imagine. You couldn't even dream the things I've seen.
I believe there could be clinical uses for taboo things like psychedelic drugs. I hate to think that without them I probably would have eventually been red pilled or turned into a fascist. It was that much of an eye opening experience for teenage me.
So while it probably did cost me about 15% of my cognitive ability, it also gave me 100% of my critical thinking ability.
I personally had horrible experiences on LSD, and I've seen even worse bad trips and panic attacks as a trip dad, but I know it helps quite a few of my friends figure themselves out. Which is why studies on these drugs is crucial.
OTOH, and this is anecdotal, I worry about how potent a lot of "normal" marijuana has become and how rapidly we've normalized high-dose delivery mechanisms for it (like waxes and tinctures). It's hard to predict the future given how "primitive" marijuana consumption used to be, in contrast.