In other words, I think the
reason why the 5D2 lacks fast mechanical parts is due to pricing
strategy (specifically, margin maximization through product
differentiation).
...
I'm hoping that eventually Canikon will start using
features I don't care about to differentiate their high-margin
products. They could give the $3,000 cameras all the important features
(body, autofocus, resolution, etc.), and try to fool the rich folks
with some useless feature, like "platinum-coated alloy results in
better autofocus" or something. I'm not holding my breath, though.