Curious how this will look when they get to implementations with less expressive type systems. Typescript & Rust are particularly good. Making a usable library for this in golang won't be easy.

And now that I think about it, Protobuf/Thrift/etc type tools are heavily constrained by finding lowest-common-demoninator of language features to allow for cross serialization. Maybe in the next generation of these tools, languages like golang don't get a seat at the table for the sake of progress -- I could be fine with it.