The GraphQL Summit 2017 was a conference that showcased cutting-edge GraphQL applications and features, including schema stitching, which allows for the combination of multiple schemas into a unified API. This feature was demonstrated through a training exercise where attendees were able to link an external API to their app's schema. Subscriptions, another new feature added to the GraphQL specification, were also discussed, with talks covering their implementation and potential applications. The conference saw increased interest in production GraphQL in complex architectures, with topics such as GraphQL API management at scale, batching/caching solutions, and error tracking being highlighted. Additionally, Apollo Client 2.0 was released, offering improved features and flexibility for building GraphQL applications. Overall, the conference was a success, with attendees from various industries and companies, and marked an exciting time for the GraphQL ecosystem.