I'd agree that 'properly' doing a status page would include something out of band attempting to use the service and checking if it worked. No idea if anyone does that.
"Message deletion failed"
"Sorry, something went wrong with deleting your message."
Edit: Seems like messages are just straight up not sending and receiving.
Users may be experiencing trouble with sending messages in Slack. We’re investigating and will let you know as soon as we know more. We appreciate your patience in the meantime.
No feedback yet on the Slack system status dashboard https://status.slack.com/
> Users may be experiencing trouble with sending messages in Slack. We’re investigating and will let you know as soon as we know more. We appreciate your patience in the meantime.
Latest status update:
Slack experiencing an outage across the app. Users may be experiencing trouble with sending messages, using workflows and various other actions in Slack. We’re investigating and will let you know as soon as we know more. We appreciate your patience in the meantime.
ごめんなさい
messages aren't posting, files aren't uploading.