Could a threading view be implemented? I.e. I click on Marc's message to indicate I reply to that thread? And if someone else doesn't care about that, he can just unwrap it while following other ideas. I don't think this is something that requires separate rooms though
Never seen this concept on chat. I expect all new chat messages to appear at the end of the list. A 'threading' feature would allow active conversations in 'older' parts of the message area, it would be just impossible to see and follow all active discussions.
Example to illustrate: two threaded discussion start at a distance(?) of one hour and you want to follow both - I don't see a chance to have both conversations on a screnn with some hundred other messages between them. (Hope it's understandable..)