Except the Nikon DF is not that great...
It's too big (it could be a little smaller, so it's closer to the original)
Layouts are awkward
Gimped AF, it's all clustered to the centre.
It's not even a body that qualifies for Nikon's profession service (like canon's CPS programme). So even the company itself sees it as a fashion styled camera instead a professional line.
If you have to have the look then I guess that's fine but do you like to show people your photos or your camera?
Some fair points I guess, not interested in "showing" the camera, but I do like traditional controls and layout etc. for example by choice I pick up my old Contax N series gear, which I continue use even though it's really old tech these days. It's beautifully built and handles great and a pleasure to use.
A Modern replacement doesn't seemed to exist.
Don't have to go for the MkIII... The MkII is a very valid option
Why are people developing black and white sensors? We don't need AA filters any more which was about half a justification for the Monochrom, and literally nobody shoots in black and white on a full frame sensor by choice.
If you want b&w just convert it. Have no idea why you would want to have a b&w sensor.
And no 1/8000