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#11
There's a huge difference between disk imaging - of entire partitions- your O/S - and selected backups. These are complementary strategies.
Imagine you have given away your Win 8 laptop- and forgot to back up some data- which you now don't have. A disk image is everything - so you can always go back to it and get more.
If you don't yet use disk imaging- do think how you would recover from major issues and avoid a clean install.