The issue is not that digital isn't useable, it's that the market is a mess with everybody scrambling over each other with features and gizmos and design, and what we're left with is a mass of half efforts since the product will be so different in 6 months, never mind by the time the product doesn't work anymore, so that anything not made (i was going to say "marketed" but that would be incorrect) as a professional tool is cheap to the point of being disposable, and only isn't because it's full of electronics.
the bloody EOS rebel is a plastic shmuckity schmuck and costs over a thousand dollars.
it doesn't have to be forged titanium or even cast magnesium. When digital cameras are really a mature technology they won't be so disposable anymore.
-planned obsolescence, the bane of modern life.