Slack has basically one main hierarchy level (messages are grouped into channels) while Zulip has two, streams and topics. So you can create a stream for each project (say) and create a different topic for any given point that needs discussion about that project.
Kind of like if each slack thread discussion had a title and was discoverable from the left sidebar and didn’t get in the way of the other threads.
Kind of like if each slack thread discussion had a title and was discoverable from the left sidebar and didn’t get in the way of the other threads.