In consumer apps, an error is an annoyance. In enterprise apps, it's a loss of revenue or compliance.
Destructive Actions
Never rely solely on a color (red) to indicate danger. Destructive actions must be structurally distinct and require explicit confirmation (e.g., typing the name of the resource to delete).
System Status Visibility
When running long batch processes (like a Bulk Action), the UI must not lock up. Provide persistent background task managers that report precise progress.