We’ll have to review this issue. I don’t believe this is related because gatsby-source-graphql is a completely different plugin. It allows you to add endpoints to a Gatsby project, apart from Prismic. Are you working with multiple endpoints on your project?
Yes, things are going pretty well over here. In fact, this is no longer an issue at present for me, since my main Prismic repository has a good bit of content types and documents.
gatsby-source-graphql is a transitive dependency of gatsby-source-prismic-graphql, see the results of yarn why here:
yarn why v1.22.4
[1/4] 🤔 Why do we have the module "gatsby-source-graphql"...?
[2/4] 🚚 Initialising dependency graph...
[3/4] 🔍 Finding dependency...
[4/4] 🚡 Calculating file sizes...
=> Found "gatsby-source-graphql@2.6.2"
info Reasons this module exists
- "@prismicio#gatsby-source-prismic-graphql" depends on it
- Hoisted from "@prismicio#gatsby-source-prismic-graphql#gatsby-source-graphql"
- Hoisted from "@prismicio#gatsby-source-prismic-graphql#@prismicio#gatsby-source-graphql-universal#gatsby-source-graphql"