And it's why you can't have a single messaging app that acts as a unified inbox for all the various services out there. XMPP could've been that but it died, and

And it's why you can't have a single messaging app that acts as a unified inbox for all the various services out there. XMPP could've been that but it died, and Microsoft tried to have it on Windows Phone but the messaging apps told them to get fucked. Open API interoperability is the dream but it's clear it will never happen unless it's forced by law.