What there has been is decades of "maybe years in jail for drug use is excessive?", to which some places said "let's have less restrictions on drug use than we do on alcohol" which is absurd though I suspect less harmful in the long term, but many have doubled down on punishment.
That is ignoring the demonstrable bias in enforcement of drug crimes, that meant that even in heavily policed and restrictive areas the drug laws primarily act as a method to criminalize specific social groups (drugs used by the wealthy generally have lower penalties than those use by everyone else, enforcement of drug crimes means that despite every study on the topic showing little racial split in use, the overwhelming majority of people in prison for weed use in the US are black).
Treat drugs the same way we treat alcohol: taxed, regulated, age restricted, etc (and please get people to stop smoking joints at concerts. I don't understand why people who would never consider smoking a cigarette inside then light up a joint in a crowded hall.)