Yeah, I think the real solution here is: let's make chat permanently archived and searchable. I find it more useful searching through Slack for old conversations around a topic than searching Confluence for the same.
But aren't these both pretty terrible tools or storing information?
Slack is an attempt at legitimizing and organizing stream-of-consciousness. It has short feedback loops and therefore cannot communicate deep research, novel concepts, nor well-cited evidence.
This is the wrong way to bring the tools of the consumer to the enterprise. Nobody asked for this chat tool - Slack is something sold to somebody who doesn't want to worry about something, not somebody who wants to do something well with low attrition.