I still don't like Slack threads. Too many conversations in Slack turn into threads, removing the conversation from visibility without additional clicking, and fragmenting the flow of information. Real conversations rarely work this way. It's like being in a meeting where every time a new topic comes up, half the people leave the room to start a new meeting, and then come back when the topic changes again. If a topic truly requires enough time and space for that, then by all means take it to another channel or a group chat. Otherwise, keep it in the main space. It breaks the flow and invites premature fragmentation, and the UX is bad.