As it seems Nikon will keep the mount "closed" for the time being, making it very difficult for third parties to make compatible lenses.
Where did you get this info from?
With Photokina on the way I was kinda hoping that Voigtlander and Zeiss would announce their Nikon Z lenses based on their current (and new) Sony EF offerings.
Had to wait 2,5 years for a decent native ultra wide-angle and don't intend to resort to adapting Nikon F lenses again when it isn't necessary.
Here's an image of the amazingly compact and capable Voigtlander 15mm f/4.5 FE sided by the original 15/4.5 LTM and the Samyang 14/2.8, both adapted to the Sony FE mount for size reference. This completely renewed for digital classic has an old skool aperture ring which can either be with or without third stop clicks, has a focus scale and a hard infinity stop, three features I can and will not do without on an ultra wide angle lens so those upcoming focus by wire UWA's without aperture rings are not really my forte.
When the Zee cameras are ones first mirrorless camera its perfectly fine to adapt Nikon F lenses to bridge the transition phase but I already went through all that 5 years ago and not very eager to make the jump to a Z7 while I have a perfect set of lenses for the a7RII, so if Nikon doesn't open up their mount I'll just stick with what I have I guess.