Yeah, it was disappointing.
I picked up a used Z8 for $200 more than the retail price of the Z6 III.
It included a couple of Cfe cards an SD card and an FTZ, all of which I will just sell, this will push the price of the Z8 to below that of a new Z6 III.
I have been using a Z6 for quite some time. The upgrade is significant but feels like nothing for my work, I will even bet that in the realms of read noise for low light stills, the partially stacked sensor will be worse than the old Z6. If I wanted that, I might as well get a Z8 with the stacked sensor. I can downsample my fluorescence microscopy images for similar results, and reap the benefits of 45Mpix for lower magnifications.
5 years for this.
As for the image I posted, someone sent it to me. They also sent it to Nikon Rumours.