Pal, how can you be disappointed that a Pentax SLR is "strictly for the K-mount base without any vision beyond that"? Aren't the C***N cameras strictly for the EOS base? And the N***n cameras only accept their own-mount lenses.
The *ist-D appears to accept every Pentax or third-party K-mount lens, screw-mount lenses, 645 and 67 lenses. Should it accept EOS and N***n lenses, too? Just what were you hoping for? Pat White