I think it would depend mostly on the diversity of combinations of data the frontend needs. Their GraphQL implementation is essentially automating the process of frontend teams asking the backend for new endpoints or configurations of existing endpoints to deliver new combinations of data for use by frontend clients. It’s pretty easy to see that certain for frontend requirements the backend GraphQL will be worth it, and for other frontend requirements the backend work would not be worth it. In this case I’m relatively confident that they’re coming out ahead.