Counter argument: Standardization and federation comes at a cost. Facebook can build a more cohesive product with interesting features by controlling the ecosystem completely. That&#x27;s the whole point; they gain nothing by just being yet-another-protocol.<p>That being said, Facebook does let you chat via Jabber. I use it (with Messenger on OSX), and it works, but it&#x27;s a completely mediocre experience devoid of what makes FB Messenger special.<p>An example: FB lets you send one-click &quot;likes&quot;. It&#x27;s a great feature; it means &quot;acknowledged&quot;. Yet you can&#x27;t send it with third-party clients, and third-party clients receive it as a URL to an image of a thumbs-up. There&#x27;s dozens of features like this. How frustrating would it be if Facebook Voice Calls only worked with some people, or someone&#x27;s client didn&#x27;t support group messages?