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by Patient0 5135 days ago
To me it's because they provide a simple way to solve the hygiene problem in an interpreter.

That is, it's easier to implement first-class macros (which allow hygiene) in an intepreter , than it is to implement scheme-style non-first-class hygienic macros...

I only say this because I know how to implement first-class macros, but I don't really understand how Scheme's hygienic macros work...