Take C#, if you want a new language feature or syntax added you have to propose it to the language design team, they have to decide it's worth implementing then you have to wait on it being implemented and released and your tooling updated.

If I want some new syntax in a LISP, I just write a macro.

e.g. the following threading macro in clojure

(->> x foo bar)

Takes x and passes it as the last argument to foo, then the result of foo is passed as the last argument to bar. Alternative you have -> for passing it as the first argument. These are from the standard library, but if they weren't they would be trivial to write yourself.

And no strings involved when you write macros in lisp either. It's just lists, your macro is just building a list. Because the syntax is just lists and there's no difference between lists and the syntax.