I think it's a little sad that they've also discontinued their large format and enlarging lenses. i'm a bit surprised that Nikon doesn't seem to see large format equipment as playing a part in their future. --
The life span of these components is , hmmmm....nearly forever.
With the lack of growth in the marketplace, new entrants can buy used at a great discount to new.
I'll bet the number of new sales of LF/enlarger lenses is pretty close to zero. If I wanted a Nikkor LF lens I'd go to Ebay or KEH. Nikon is competing with its past sales. Time to move on