That might be true - but in my little corner of the world, Apple have solved that problem for their users, and even most of my least technical friends know the importance of keeping regular backups and Time Machine has reduced the friction enough that proper backups are the rule rather than the exception. I also see a significant number of friends/colleagues in the Linux camp telling people how they've got backup regimes that work "just like Time Machine", so I think the effect of Apple having shipped a "good enough and very easy-to-use" backup system has further reaching consequences than just people running Apple hardware - when people have Macs at home with Time Machine, they ask difficult questions at work when the IT people tell them recent revisions of their files aren't available…

Going forward, I see Dropbox or something like it making "backups to additional local spindles" become quaint and anachronistic. Why backup to an external drive next to my computer, when "the cloud" arranges to have copies (and archives) of all my data on multiple machines I own, as well as on Dropbox's (aka Amazon's) servers?