Should we reunite fragmented conversations?

I think this is a pretty interesting hypothesis. It certainly applies to my usage pattern. I detest aggregations of comments from multiple sources. It's like trying to watch six television channels at once, three of which are inevitably tuned to the home shopping network.

You can't have a meaningful conversation with a thousand participants. It's much easier to have a hundred conversations with ten people each, conversations in which all parties are acquainted or at least share a set of common assumptions. Our languages, our social habits, perhaps even our brains themselves are designed for that use case.