So we're skipping the D6??I've never felt Nikon planned for D850 owners to migrate to the D7 unless its lower weight (1.29 pounds compared to 2 pounds) has a particular, understandable appeal for certain photographers. Instead, I think Nikon planned the D7 as an alternate to the D850 as an upgrade from a lesser Nikon body for those who find the benefits of mirrorless technology appealing.
I bought my Z6 because Nick did .Or if you go back as far as I do, film vs digital. and for some here B&W vs color. Life IS good!