Understood, but the fanfare is coming from the fact one can take a language without JSON, or SQL, or infix notation, or ..., and add it as a library. It means the language itself is flexible enough to support future paradigms and standards at the code level without a language redesign.

I agree it's nice when something as common today as JSON is built in to a language. But for something like Common Lisp, whose roots are now nearly 40 years old, the fact it can easily support JSON literals is nothing short of amazing.