Reddit Was Fun

That makes me think having something like "federated communities" could be neat, where a community on one instance could opt in to have content mirrored/visible from a community in another instance. In practice it would be something like subscribing to a community on one instance essentially being equivalent to subscribing to multiple communities on different instances, but if there is disagreement on e.g. moderation practices moderators might decide to "defederate" the communities.