No dude, I have no secret info. But that is almost certainly where things are going. Eventually we will have GraphQL access to objects and resources. Until then, we deal with the RESTful API and do 100,000 API calls in ~14 hours. YMMV.
Therefore, whether we like it or not, we understand that using Metafields is non-performant when your call count is high. Use a different strategy. That is the secret. Knowing how to squeeze performance.