fentanyl I think is what's replaced meth at this point.

No there’s plenty of meth around, don’t just guess about things. They’re making meth with a new process at industrial scales these days, by the ton. Fentanyl gets a lot of air time on the news these days but don’t confuse that for prevalence in reality, problems aren’t proportional to the amount of attention they get.

https://www.theatlantic.com/magazine/archive/2021/11/the-new...

... which is totally in keeping with the war on drugs' track record. Efficacy was never quite their strong suit.

Mexican superlabs put an end to the shake-and-bake method of making meth. And the biggest problem with shake-and-bake meth was the externalities of people making it at home, including bottles that would burst with caustic chemicals, and properties being condemned from the phosphorous in leaching into the walls.