In reply to Mike Schinkel.

I shared the same concerns. We are currently building a web app using WordPress as a CMS with the help of ACF. We have 10 different custom post types and each CPT uses 15 custom fields on average. All the custom post types are linked to each other via bidirectional relationships.
We don't use the tinymce editor at all for any of the CPTs.
We certainly hope that post meta data will not be stored in post_content. How would we query the post data using GraphQL or the REST API!?