These are not informal conversations though. Maybe a small percentage is informal on slack, but even that is "SFW" communication that no would would care if it

These are not informal conversations though. Maybe a small percentage is informal on slack, but even that is "SFW" communication that no would would care if it is logged. It's script snippets, customer support information, links, design decisions etc. Of course this stuff should be preserved in knowledgebases, tickets, commit messages etc, and it is, but sometimes people forget or something doesn't seem worth documenting. That's slacks main selling point for me, the ease of finding some technical conversation from 6 months ago.