Just looked through the manual for Sutudio NX, and found that the core function hasn't been changed from NXD that I used to use when I had D750. NXD was not particularly fast software on my Haswell i5 16GB Win10 machine, but Adobe CC is not particularly faster even on my current 10th gen i7 32GB Win10 machine compared to my previous i5.
I used LCH editor mostly for tweaking my UV/IR images, so the color accuracy and the ability for the fine adjustment is not all that important. I was satisfied with C NXD and unsbscribed Adobe CC while I was using it.