> JSON exists (...)

The blog post leads with the personal assertion that "ad-hoc and built by amateurs". Therefore I doubt that JSON, a data serialization language designed by trimming most of JavaScript out and to be parses with eval(), would meet the opinionated high bar.

Also, JSON is a data interchange language, and has no support for types beyond the notoriously ill-defined primitives. In contrast, protobuf is a data serialization language which supports specifying types. This means that for JSON, to start to come close to meet the requirements met by protobuf, would need to be paired with schema validation frameworks and custom configurable parsers. Which it definitely does not cover.

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ardit33 5 days ago | parent [-]

You must be young. XML and XML Schemas existed before JSON or Protobuf, and people ditched them for a good reason and JSON took over.

Protobuf is just another version of the old RPC/Java Beans, etc... of a binary format. Yes, it is more efficient data wise than JSON, but it is a PITA to work on and debug with.

	▲	motorest 5 days ago \| parent [-]
		> You must be young. XML and XML Schemas existed before JSON or Protobuf, and people ditched them for a good reason and JSON took over. I'm not sure you got the point. It's irrelevant how old JSON or XML (a non sequitur) are. The point is that one of the main features and selling points of protobuf is strong typing and model validation implemented at the parsing level. JSON does not support any of these, and you need to onboard more than one ad-hoc tool to have a shot at feature parity, which goes against the blogger's opinionated position on the topic.