Larry,
It is supply and demand thing. Very few need the T/S lens and the
few do need it won't pay the price! ( the fewer the buyers the
more it would cost). Have ever looked in to a Ferrari sticker?
I'm not sure what it is, but the re-occurring excuse that often
pops up is the "few need it, it's too expensive" excuse. I've
heard it applied to IS, TS, and FF as reasons cited for Nikon to
not go in that direction or offer those things at one time or
another. Keep in mind that, unlike a Ferrari, these are tools that
help people make money and actually serve a practical purpose. And
in the meantime, Nikon (eventually) comes out with their own IS,
TS, and I would expect someday, FF.
By the way, I own the Canon 24mm TS-E and 45mm TS-E, and I'm
certainly not the only one. They aren't all that expensive,
considering what you get for your money and what they can do for
you. And they've both paid for themselves, anyway. But isn't it
nice that Canon let
me decide if I wanted to pay the price for
them?