The sad truth is that with 99.8% of customers unaffected, it was probably thought to be a minor issue. If those customers didn't have Gergely's ear we probably wouldn't have heard about it.
> Atlassian claims the customers impacted were “only” 0.18% of its customer base at 400 companies.
From https://jira-software.status.atlassian.com/ :
> The team is continuing the restoration process for the ~400 impacted customers.
If this is truthful it implies implies more than 400 impacted customers.