The intent of pydantic is to be a parser of (possibly recursive, with composition of classes) key-value "languages". It could, in principle, evolve in a complet

The intent of pydantic is to be a parser of (possibly recursive, with composition of classes) key-value "languages". It could, in principle, evolve in a completely different direction than dataclasses/msgpack/dataclassy, etc. This is like -- there are many libraries that do PCA, from sklearn to statsmodels to plain scipy to genomics tools. But in a glue-language workflow you should choose a tool for its semantics.