I was thinking the same thing, though I couldn't remember the timeline. Makes me wonder if there was something already in the zeitgeist, or if it was fueled by the obsession with purity in the series. I could totally see Breaking Bad causing chemists to want to up their game, or causing chemists to get clowned for having low purity.
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replyyes, while the show probably popularized the idea of purity for meth, in general strict prohibition leads to increase in purity and potency. We've recently seen that with heroin/fentanyl. There is probably still no "fentanyl of meth", and thus so far only purity increase. Once a more potent, fentanyl-like, meth appears, it will probably similarly get into and displace a lot of classic meth trade.
replyWhat? Prohibition historically showed the exact opposite.
replyI suspect higher purity & potency of street drugs has much more to do with more sophisticated operators operating outside of the US than strict prohibition. Same with fentanyl.