A lot of companies have integrations to atlassian suite which might not be easy to shift from.

Secondly, there are a lot of individual competitors to Jira, Confluence and Bitbucket but which competitor can offer all three under a single invoice? May be Microsoft, can't think of anyone else.

Also for such an extended downtime the customers are entitled to a discount or a credit note which a lot of CXOs consider in their decision making.