Afaik was the golden age if drugs long ago, before the war on drugs and opium law, when drugs were available off the pharmacy for cheap and in good quality. Read that in other times a gram of cocaine was around the same price as a bottle of fucking red wine

! Imagine that. And many nice OTC drugs like katovit (prolintane), amphetamine, even meth and opium. Just that the people either didn't know it had other things to worry about like pressure to stay alive. The 60s must have been a good time as well. Would love to go there with a time machine.
In recent times there was an explosion in novel substances, research chemicals and bath saltks etc but mostly limited to

and

. Produced in China but I doubt that there's much use of RCs. But RC people make a different crows than traditional users, just the internet connects both worlds with pages like bluelight. Once I saw a good book about recent drug culture including the history of RCs but not limited to that at the library but unfortunately forgot the name and author. Maybe somebody knows it?
Also general knowledge should be that war on drugs, opium law etc were never about personal health, it was political reasons from the beginning and while some high profile people recognize that the policy was a big failure with huge collateral damage, most of the countries continue outlawing substances just because they have recreational potential and not based on harm reduction.
My hunch is that drug use is stagnating on a higher level than most people would assume, with many users which never get into problems unless somebody makes some mistake and they get into the focus of law enforcement. But I wonder about the real numbers for both street drug and research chemical users. Think these shops will make millions by selling RCs.