Comment by gingerBill

> I never got why compilers don't have pluggable syntaxes.

Because then you've created dialects and produced the Curse of Common Lisp all over again.

Syntax matters a heck of a lot, and you want consistency and coherency across codebases of the same language, otherwise you don't have a language at all. So wanting it "pluggable" is in fact the worse possible choice you want.

It's also a naïve view to think that concrete syntax can be trivially swapped out with the abstract syntax remaining. For certain things it can usually work (like declaration syntax in the article) but for most things it cannot.