Might as well drive the Rolls Royce or Bentley over the MB or BMW...
I don't like shooting without a grip.
I don't like shooting a camera not really designed for shooting (pretty much every camera on the market)
I don't need the MP of a D850, but I want the body of it over a D750 (mainly the viewfinder)
I don't want a camera with two different types of memory card slots.
having wifi and/or BT would be nice, but I really have no use for 44mp.
the Sony A9 and two similar lenses would be another option for my, but I wasn't the biggest fan of the AF on my a6000 vs. a dslr, I never quite got used to it and missed so many easy shots due to it.