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You can't bring up Feyerabend without mentioning Imre Lakatos. The "methodology of scientific research programmes" is another fun read that takes the matter of demarcation a bit more seriously than AM.

For example, Lakatos isn't satisfied with "anything goes" because it fails to consider the political and social consequences of being unable to recognize science from pseudoscience. For Lakatos, demarcation is necessary to maintain a "standard of objective honesty", and avoid falling into an "intellectual decay".

Overall, Lakatos is much less provocative than Feyerabend, but is equally invested in picking apart the historical nuances of scientific progress brought into question by Popper and Kuhn.