Clutch predicted this in 2004: "Everybody move to Canada, smoke lots of pot, everybody move to Canada right now!" (Clutch, "The Mob Goes Wild", Blast Tyrant. DRT: 2004) https://youtu.be/XDCNJtK6XkE

And seriously, there is obviously a massive commercial interest in legalized marijuana, hence we'll see more and more moves in that direction. The correlation with de-demonization (and de-criminalization!) of 'organic' drugs and widening of personal liberties is a side-effect, albeit a welcome one.