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Those differences are not due to the syntax, they're due to much deeper things like the differing type system.

I'm not sure I agree. Certainly there are differences other than syntax, but that doesn't mean syntax is irrelevant. For instance, would Clojure programmers use maps as much if there was no syntax for map literals?

Syntax determines what parts of a language are within easy reach, and therefore affects how programmers use the language. Tools that a syntax make easy are used often; tools that syntax makes hard are used infrequently. This indirectly impacts how a piece of software is designed.

This is very much what I meant in the post (hi, I'm the author :P)! CL has maps, but they're a pain to use - not just because of the syntax, but because of the relative dearth of standard library functions to work with them compared to say, lists or even vectors.

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