We've been using Mattermost for so long I don't know what happened to Slack but the fact that they can't keep their customers is not really an issue as long as we have similar software available for a more just cost or self-hostable.
This type of app isn't supposed to hold data. At least in my opinion, Slack is more for instant messaging and e-mail for tracing.
If you’re going to spend the effort to rewrite your chat conversations back into email, you might as well throw those summaries into a wiki or other documentation system..
This type of app isn't supposed to hold data. At least in my opinion, Slack is more for instant messaging and e-mail for tracing.