[jillesvangurp]

We're talking about a state without big cities, a comparatively tiny population, generally not a lot of crime, and a mostly white population. The only thing we'd be able to learn is whether drug usage in that state is affected at all by not changing a thing (it's illegal now). This would indeed be surprising as doing the same thing over and over again and expecting different results is a sign of insanity (to paraphrase Einstein). Also, it would be a good way to characterize decades of drug policy making in the US.