The market always rewards the top of range. That doesn't mean biggest numbers, but biggest profits. As anybody knows, it's easier to sell one Aston Martin than thirty Ford Focus, since always there will be a rich man for wich the expenditure for any item is marginal relative to his wealth, while for the average customer/user every expenditure is affected by personal and general situations. Furthemore, for many pros, the tools of their job are a status symbol very important to the eyes of their customers. By the way, electronic world is quite different from the mechanical one. When you bought in the past an Hasselblad, you could be sure that the next fundamental step will be made after ten-twenty years, now you can see doubling resolution in two years and, although everybody is ready to snobbishly affirm on a forum that this is not important for him, everybody knows how is important to have two (good) pixels instead of one... So if your investment is not marginal compared to the profit you get from it, or the expenditure is not marginal relatively your wealth, spending more the double of a 5D MkII on a 1Ds is not so easy if you think that in two-three years its features will be definitely surpassed by the new one. Old 1D features can be very good, but a 10Mp image can't compete with a 20Mp one, specially in top class, where Canon or Nikon don't trick with numbers...