The IM system I would like to see would be intended to be used like a very lightweight bug tracker. It would be very thread-heavy, and a toplevel would correspo

The IM system I would like to see would be intended to be used like a very lightweight bug tracker. It would be very thread-heavy, and a toplevel would correspond one-to-one with a task/bug/question. Obviously you can do all that with Slack today; the difference is that when a conversation is done, it can be marked closed and not show up in the view that you see. (Obviously you would be able to reopen it or find it again with search.) In other words, the default view is a list of every conversation still relevant to you and your team, rather than an infinite-scrolling history. EDIT: Hey, Zulip sounds much like what I want!