Because Slack is a chat system and you typically just care about the most recent messages (which are always displayed). I find scrolling back in Slack to actua

Because Slack is a chat system and you typically just care about the most recent messages (which are always displayed). I find scrolling back in Slack to actually be very irritating, when I have to do it. It's slow and the view jumps around whenever the next page loads in. (The UX on the search functionality is also fairly lacking.)