Feature is still being worked upon. No new details to share at this time.
-WarrenAngela Sze commented
It seems odd and unlike other chat/team experiecnes that the compose box at the bottom is always ‘starting a new conversation’ rather than just adding to the ongoing conversation in the Channel. I often send a few short snippets, and these all get started as separate conversations. If I want to respond to someone in the channel, and its at the bottom of the window, why do I have to click ‘reply’ to reply to them? Please make chat like chat :)