I have about 300 conversations/teams/etc in the left panel so I obviously ALWAYS have the 'Show Unread' on since scrolling through that long list is horribly inefficient.
However, there are 4 or 5 conversations that I would want to pin to the top and have them always visible even if there are no unread messages in them. These are the conversations that I need to look at multiple times per day, so I either have to search for them or turn off the 'show unread' and then find them manually. It's really inefficient. Would love for those 'pinned' ones to just be visible/selectable all the time.