I would agree their claim is a bit early, but I think a key difference between those you mentioned and CBOR is the stability expectation. Protobuf/Parquet/etc a

I would agree their claim is a bit early, but I think a key difference between those you mentioned and CBOR is the stability expectation. Protobuf/Parquet/etc are usually single-source libraries/frameworks, which can be changed quite quickly, while CBOR seems to be going for a spec-first approach.