I 100% agree with what Benjie said. With things like schema stitching (see https://blog.graph.cool/graphql-schema-stitching-explained-s...) it's getting super simple to compose GraphQL APIs and therefore use PostGraphile as a "GraphQL database".

Static GraphQL bindings even allow to take this even a step further by mapping the GraphQL API capabilities to your (typed) programming language. This kind of gives you a typed "GraphQL ORM" without the typical downsides of a ORM (performance, API limitations etc).

If you're interested, this blog post further describes these concepts: https://blog.graph.cool/reusing-composing-graphql-apis-with-...