Err, email copies, backups, USB sticks, save-to-sync, ... There are lots of shared/safe alternatives when saving my data/work. Not having to have to sweat net lag, though, is a big win. And devices are pretty damn reliable unless you drop the things.

And even then, I have this phone thingie that has lots of storage - why can't I sync to that directly without 3rd-party involvement? This would address you "what if it crashed" by giving a second copy (or more if there's multiple people sitting near me).