At the other end of the spectrum, I manage a 20-user private channel in which users coordinate to play together and chat about games in a single channel, voice

At the other end of the spectrum, I manage a 20-user private channel in which users coordinate to play together and chat about games in a single channel, voice chat in about 2-3 channels and the quality of life is various degrees of magnitude better than the old skype/teamspeak days.