The benefits you mention stem from having a total view on all services and which protos they are using. The same is achievable with a registry of OpenAPI docum

The benefits you mention stem from having a total view on all services and which protos they are using. The same is achievable with a registry of OpenAPI documents. The only thing you need to ensure is that teams share schema definitions. This holds for gRPC as well. If teams create new types just copying some of the fields they need your analysis will be lost as well.