Originally posted by JPT This one?
Yes, thank you. Perhaps I am an apologist for the K-01 since I bought it pre-order - but I've always thought of it as the test bed for the technology. What I mean by that is that Pentax could learn on what was potentially a throw-away camera without putting the mid-range dSLR at risk. If the product and tech worked, bring the K-02 and the K-30. If the tech worked and the K-01 failed as a product, bring the K-30 and let the K-01 go. If the technology failed, hold back the K-30 and rework it.
I also believe they were experimenting with non-traditional bodies, both the K-01 and the radical shape of the K-30. The Western reception of the K-01 I think was unexpected so they just buried it. Unfortunately that may also have buried mirrorless and the XS lenses for quite some time. The return to a traditionally-shaped body for the K-50 from the K-30 also says something about radical design, as does the reaction to the K-S1 - the West just doesn't like radical camera design. (I think one issue with the K-30 body design was 3rd-Party lenses that didn't fit well under the flash snout).
Of course this is all conjecture on my part.