I think that the use of my Epson V-750 as my main scanner and the Nikon 9000ED as my scanner of choice for more critical work sounds like a good interim solution. I haven't been using the Epson in that it arrived with lots of junk on the back side of the glass..top and bottom and I've been lazy and not sent it in. Will do so now. This was actually my original intent upon buying two scanners at the same time.
Clearly, flatbed technology will improve. I'm hoping that Epson and others continue to produce transparency illumination. I think that third parties will always step up to the challenge of negative holders. So, if the illumination is available, we should have scanners available for the next ten years or more.
Wet printing is an option for those with the space and wanting a print as the final product, but the digital age has expanded those requirements.
Regarding the 9000ED. I believe that Nikon is producing these in batches. They wait for the orders to reach a critical amount and then restart production. That is a very considerate nod to those of us using film, because I doubt that this product produces much of a profit. So, those wanting to scan.. place your orders and keep this spotty, but active process going.