[cpburns2009]

JSON's types are limited (object, array, string, number, boolean, and null) and provides no standard way to define new types. It frequently devolves into ad hoc data structures with stringly typed values. I'm pretty sure that's what @IshKebab meant by JSON being "pretty much untyped".

[dozzie]

I'm pretty sure that's not what he said. He used an argument that is not about how much one can express directly, but about dynamic typing nature of JSON.