Optimistic updating is when the message moves from the chat box into the conversion thread. It assumes that in most cases the message will be sent and it makes

Optimistic updating is when the message moves from the chat box into the conversion thread. It assumes that in most cases the message will be sent and it makes sense to update the UI. Usually though it’s accompanied by an indication of some kind to also show progress. If slack doesn’t indicate it in anyway that’s confusing.