&quot;They seem to care about their data somewhat, which of course means they have off-site backups.&quot;<p>I don&#x27;t think a reply of &quot;there are classes of data that one can care about and still not have backups of&quot; is unreasonable.<p>&quot;...I can surmise is that they&#x27;re confused&quot;<p>Again, I think showing a few cases in which users can have perfectly non-confused reasons for using these filesystems is  pretty straightforward as conversational gambits go.