> unambiguous

But it's pretty ambiguous when parsing. Like a long number -- is it a floating point, BigInt or i128? Every language is different

JSON was a blessing because it was literally Javascript. It was unambiguous in Javascript only.

A true unambiguous would be "everything is a string", like TCL.

Tcl brings with it some other ambiguity when serializing though.

    {a 1 b 2}

    {"a": 1, "b": 2}
    ["a", 1, "b", 2]
    "a 1 b 2"