They don't have a "hard" persistence layer, it's all in-memory, which is the only reason they can have any sort of performance. In terms of the actual queries,

They don't have a "hard" persistence layer, it's all in-memory, which is the only reason they can have any sort of performance. In terms of the actual queries, you'll find a bunch of prefetch calls and dumping of all data related to your user. So much for "fetch what you need". What you will also find is, surprise surprise, not actually a whole lot of graphql queries. Instead, a bunch of plain REST-ish queries, custom WS, and some graphql.