I left a comment [here](https://github.com/OAI/OpenAPI-Specification/pull/2370/files#r502806631), but since the pull request was already merged, I decided to open this issue. I wonder if this URL should resolve to some content (instead of a 404): https://spec.openapis.org/oas/3.1/schema-object I was expecting a meta schema object at that URL.