Comment by pjtr

The problem with XMPP MUC's is that it's modelled after IRC, as that's what the protocol hackers know and love. But (please forgive the hyperbole) normal people don't use IRC, they use Skype. And the Skype model is so foreign to the IRC / XMPP techies that they'll always dismiss any attempts to add these features, often with spurious technical doubts as you just did. Ignoring that Skype has these features since a decade and has taken over (some parts of) the world because it has them. (Skype alone today has about ten times more daily active users than all IRC networks together!)