I hope one of them is "I like the legal risk that comes with exposing myself to patent trolling": https://medium.com/@dwalsh.sdlr/using-graphql-why-facebook-n...
Understand the pause, and if we were a social networking company I'd be more concerned - but already our decision to use GraphQL/React is paying off, as it differentiates for customers looking to integrate our product into their product due to the richness of the API that we are inherently providing.