It depends what you&#x27;re doing really.  I run a 5 disk ZFS cluster to host media files.  I&#x27;d rather not deal with failure very often, but when it does happen and I lose a whole bunch of media, I can download it again.<p>The second I elect to host anything even remotly important on it, it&#x27;ll be backed up, but until then there&#x27;s no need for me to pay to host that elsewhere.<p>Professionals who think they don&#x27;t need backup&#x27;s because they have redundancy do need a slap though.