Why would anyone want to use an inefficient complicated network to send a Git patch rather than sending it over email, using Git integrated workflow?

What I'm actually eagerly waiting for is GitLab instances being able to federate using ActivityPub, allowing remote forks and auto-updates, merge requests, issues opening and commenting, following users and projects… all that without having to open an account per instance.

See https://docs.gitlab.com/ee/architecture/blueprints/activity_...