I usually don't need to worry about backing up my wallets because I don't normally stick with any coins for an extended period.
I was able to necro the drive long enough to boot up and grab my wallet and some other important things, but I suppose I need to add a new harddrive to my list of junk to blow the last of my cash on.
5$ usb stick x 4 = 4 less chances of having to depend on luck to recover your wallet. Also I wonder if anyone has heard of someone protecting their coins from an emp or solar flare? That would be cool and funny at the same time. Depending on the size of the catastrophe it may be worth it, you never know, lol!