[Shorel]

Your counterpoint makes no sense...

And Protobuf has generators for more languages than OpenAPI/Swagger.

[wing328hk]

FYI. OpenAPI Generator supports many programming languages and server-side frameworks: https://github.com/OpenAPITools/openapi-generator#overview

This is not to say it has more languages supported than Protobuf as I do not know exactly how many generators out there supporting Protobuf.

(OpenAPI Generator also comes with the generator/converter that converts OpenAPI spec documents into gRPC and protocol buffer schema files. Not sure if OpenAPI Generator is also counted as a generator for Protobuf)