Why GraphQL Between Microservices Is the Worst Idea and the Best Idea at the Same Time

It seems like everyone is talking about GraphQL. "GraphQL all the things!!". But does GraphQL really fits everywhere? What might be some of the issues of using GraphQL between services?

In this talk I will demonstrate different approaches that are currently being discussed in the community, their downsides and pitfalls and also reveal a new radical approach that might shine a new light on the subject.