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/Drops tin foil hat.
Really? I know lots of folks, within the industry and without, who use cloud backup services like Carbonite and Crashplan precisely because they are so much more convenient than maintaining a physical backup scheme, however simple. I veer in the other direction, because I trust USB HDDs in my physical possession more than I trust Crashplan or Carbonite not to screw up, but the argument from convenience is not an unreasonable one, and I'd say it certainly does count as the cloud "respond[ing] to popular demand".
It's not mutually incompatible: I trust both combined more than I trust each one alone.
What I consider "cloud" is closer to google app engine.
I mean, it's not as though you can't buy that sort of equipment and media in the relatively low quantities you'll need for individual use; you can easily, if not cheaply, purchase a SATA LTO-5 drive [0] and tape cartridges for it [1] right now, online. Sure, you'll pay a premium price per item, which a large organization placing an order of commensurate size wouldn't pay -- but that's hardly unique to this class of products, and strikes me as awfully scanty basis on which to construct a conspiracy theory.
[0] http://www.amazon.com/Quantum-LTO-5-Height-Tabletop-Bundle/d...
[1] http://www.amazon.com/LTO5-Ultrium-1-5TB-3TB-Case/dp/B003KR4...
Ironically the lack of a consumer grade system is bad for business. A lot of companies have remote offices with crappy connections that could be kept in sync with discs in the mail.
As for synchronizing remote offices, why not BD-RE? I can't imagine there being all that many companies at the intersection between having enough remote offices to care about synchronization, having those offices be in places without reliable backhaul, and needing to keep so much data in sync that one BD-RE 16x drive per office, and a relative handful of discs, would be an impractically large expense.