An Atlassian outage that began on April 4 left ~400 companies without access to Atlassian Cloud services for many days, and only 45% have since regained access (Gergely Orosz/The Pragmatic Engineer)

Gergely Orosz / The Pragmatic Engineer:
An Atlassian outage that began on April 4 left ~400 companies without access to Atlassian Cloud services for many days, and only 45% have since regained access  —  Hundreds of companies have no access to JIRA, Confluence and OpsGenie.  What can engineering teams learn from the poor handling of this outage?