The end goal of this proposal is to build interoperability features into GitLab so that it’s possible on one instance of GitLab to open a merge request to a project hosted on an other instance, merging all willing instances in a global network.
To achieve that, we propose to use ActivityPub, the w3c standard used by the Fediverse. This will allow us to build upon a robust and battle-tested protocol, and it will open GitLab to a wider community.
I don’t think anything is yet, because thankfully interop and decentralization are core design principles of git itself. But it does become more centralized the more parts of the workflow we move to these platforms, like project planning, reviews and build processes. We are not at the point where you can’t reasonably use anything but GH, but that’s definitely M$'s goal, and we’re getting closer imo.