@fluffy @Sighs @Mr_NutterButter @beardalaxy that statistic likely skews a lot by state. fwiw I'm aware of negative cognitive effects but not any significant negative physical effects at sane quantities (other than those from regular smoke inhalation if you go that route)
but also even the negative cognitive effects seem to vary a surprising degree from person to person. a few of the smartest and most diligent workers I've known were high almost 24/7 which really surprised me when I found out. I realize that's not the norm though
as with other drugs I suspect that most people who exhibit severe addiction and dysfunctional behavior likely have other problems in their life that are fueling the abuse