Status page is updated with ongoing incident: https://status.slack.com/2023-10/ad8f0e62516e8812
“Users are having trouble connecting”
“Some customers are encountering various errors”
They know exactly what’s going on, at least superficially via usage metrics, and should be able to quantify it.
The problem is, organisational leaders have performance reviews (and bonuses) tied to service health, and they'll avoid declaring outages to avoid looking bad.