@tinyrabbit I can imagine. But it might impact how conversation takes place.

People going off-topic multiple times, and others responding to that may be just as messy.

In Discourse forum topics for instance you often hear "please stay on topic", or a moderator forks some comments in a new topic.

Fedizens might be less inclined to interact, or would not to explicitly watch/unwatch thread comments to get the desired view of the discussion.