If we used standard/open IM/AV call protocols (lets say XMPP, and XMPP Jingle) you would just have two accounts, just like you have a personal and a work email

If we used standard/open IM/AV call protocols (lets say XMPP, and XMPP Jingle) you would just have two accounts, just like you have a personal and a work email address. You can then choose to either: - use a client that supports multiple accounts/profiles (either one at a time or multiple concurrent logins); or - use two separate apps. "I want to keep my private and work life separate" is not a good defence of fragmentation. By your logic, we should encourage every single email provider/software vendor/project to use their own subtly different protocol, and require the use of their own client software.