Everything can be serialised as something else with various degress of difficulty, but one of the beauties of JSON was that it had support for most of the nativ

Everything can be serialised as something else with various degress of difficulty, but one of the beauties of JSON was that it had support for most of the native types of javascript. It's nice not to have to write special logic to serialise / deserialise the way you want. In particular, the ability to round trip all the standard types would be really useful.