Just a concurring note...Nikon's new "NX Studio" seems to be good, though it does not incorporate the functionality of "Picture Control Utility 2" which I find useful...e.g., the predefined color tints.
I generally prefer moderate-sized laptops coupled with a larger external monitor. However, the acquisition of a larger Windows-based machine (DELL) with a 17-inch UHD monitor has changed my perspective. The 17-inch screen is sufficiently large for photo editing, while the UHD screen improves significantly on the resolution of the stationary monitor, which was a little dated.
Nikon Gear's ongoing dialogue is always engaged...Thanks to All, Robert