I just don't understand why you would pay $3000 just because it supports old glass. Whenever I've compared 25 year old glass with the modern equivalents I just don't find they are as crisp. For example I have a Nikon 75-300mm f/4.5-5.6 AF that belonged to my father that we used to use a lot. Once we bought the modern 70-300 VR it's never been on the camera again having compared the difference. Not pre AI but you get my point.
Maybe they have a look that appeals to that person and I know sharpness isn't everything in that respect.
It just feels like paying $3000 for a record player to play old 45s or 78s, when I could get a good MP3 player for $150 and just buy the old records from amazon or iTunes for $700.
All I can say about the records vs. MP3 thing is to tell you to hunt down recent Neil Young interviews where he talks about digital music and how bad it really is compared to what you used to get from vinyl, and particularly what is lost in the final format compared to what's put down in the studio. Every format has its weaknesses.
As for old glass, there's a lot of stuff that's just "old", but there are also some amazing lenses that were produced back in the day, and for Nikon to make it possible to
finally use them properly in the digital age earns them some points with long time enthusiasts, while also paying homage to the quality of the product that Nikkor has been putting out for years (is it a mere coincidence this happens as Nikkor celebrates its 80th anniversary?). Not all old glass can compete with modern stuff, but for folks who have had a lens for decades, it means something to them.
I mean, they keep coming out with new women every year, but that doesn't mean I'm dumping the Mrs. for the latest model.