rather ironic given that, in at least some instances i use, the primary mode of using slack (to the point that some members will complain if you violate it) is as a shitty forum. most discussions are segregated into threads; there isn't really much in channels other than the collection of initial messages that started a thread.
i despise this given that there's nothing like the bump mechanic in channels (threads with newer posts don't move to the top of a list, they just stay in their original chronological order), and in the thread view where there is, you can't keep threads uncompressed, there's no pagination for threads with 100s of messages, and finding individual threads is a chore because they're still not completely compressed.