One of the challenges of collaborating remotely is there's a single-tracked conversation.
People have to queue, raise their hands.
In real collaborative contexts, conversations can slip into smaller sub conversations without people even realizing they're doing it.
They just kind of turn to someone and then if it's too loud they edge away from the main conversation just a little bit.
A percolating sort that creates and extends and attenuates naturally without anyone in the system individually having to think about it.
Totally fluid and emergent, allowing surfing the efficient frontier for a set of conversations in that moment.
Most tools have no affordances for it, or only weird top-down "breakout rooms" affordances.
Even tools like Gather require people to do something explicit to fork or rejoin a conversation, it's binary, not continuous.