I have always had this fantasy thinking of what happens when outages of one of these major service never come back online i.e. in this outage Slack loses info of all the accounts, users, messages etc. How would people react? What would engineers do to recover? I always found that idea fascinating. Imagine Google saying tomorrow that they lost all the accounts and emails. What kind of impact the world will have?
Slack is mostly real time communication, at least for me. There are a few bits and bobs that really should be documented that are in the messages though.