I worked at a place that used Slack pings in lieu of tickets. The history was kept for ~7 years. This is a huge liability IMO. A off comment by the CEO could be misunderstood by an attacker or the public if it was to be leaked.

I’m saying it’s ok for quick cursory discussions but those who retain Slack messages for tribal knowledge tend to have larger organizational issues. This knowledge should be in tickets where it’s expected to write well written responses with the intention of documenting knowledge.