There isn&#x27;t one because it doesn&#x27;t make sense. As facebook has proven, people generally want one place that gives them the stuff they indicate they want to see. A federated system means more work for the average person.<p>I think federated systems generally (even governmental) aren&#x27;t sustainable because they require too much effort from individual users for them to remain good - so they trend toward single or few &quot;owners.&quot;