[gmmeyer]

Slack and the others have different contractual guarantees and different regulatory environments. Comparing them is not really fair because the reality is that these other services probably just lose tons of messages and slack/teams can't do that! They have to have better guarantees.

[radlad]

IME, Slack is far more likely to lose my message than iMessage. I believe that's part of the point being made above.

[gmmeyer]

I've never had slack lose a message when it's up

[radlad]

That's kind of the definition of a service being up. :) I've experienced numerous "soft" outages which result in messages not sending and getting lost - and even more double sends, sometimes very distant from where the message was originally sent.

ITT: Anecdotes