Sorry I may be asking a dump question.
Since resources are stored in etcd in serialized form (json or protobuf), and since serialization/de-serialization done by the client/scheme, what is the real use of this CRD definition inside apiserver?.
One use I can think of is discovery, it may be giving single endpoints for all resources of same kind.
other wise another use is code-generator(controller, client etc), which is not a runtime use.
What is the real use of CRD definition inside apiserver?, where it helps?