I know plenty of people who use portable hard drives, flash drives and writable optic media as a backup... I don't see many downsides in that, barring catastrophic loss (which can happen to second party storage as well, though they do tend to be more professional about being careful).
Of course, a burned DVD isn't going to let me access my file from the office and at home unless I take it with me, so there are drawbacks.
Of course, a burned DVD isn't going to let me access my file from the office and at home unless I take it with me, so there are drawbacks.