Brian Cooksey, an engineer at Zapier, provides a fine introduction to GraphQL and other Graph API implementations. He also points out that REST APIs aren’t going anywhere, and it’s nice to know about the pros and cons of other options.
There are a few GraphQL wrappers for the WordPress REST API floating around, and that may be something core itself does at some point; the two aren’t mutually exclusive, necessarily. Also, Facebook changed the GraphQL license along with the React one.
