The reason the temperance forces federalized in the first place was that they couldn't make prohibitionist states stay prohibitionist. Leaving it to the states is, as a practical matter, with plenty of historical precidence, the effective end of prohibition. A-B comparison of drug policies will be the end of drug policies, for the same reason they are coming to an end in the european neighbors of Holland.
As if these irrelevant socialistic nations are anything to emulate.