I really don’t see the benefit of forge federation. Why do people care that completely separate projects run in completely separate forges? A project’s issues and pull requests are only useful for that project. The author mentions avoiding multiple logins and searching across forges. The former is already addressed by social logins / federated identity. The latter is not very useful today, on a centralized GitHub, as…
There's value in related information being aggregated and linked across many projects.