I still can't get used to it!
....
Nikon changed over from CNX2 to CNX-D in a panic ...... Also it lacked features owned by Nik a software company bought by Google.
......
I don't think that the traditional and ubiquitous brush tool is a feature owned by Nik, so it's absence in NX-D is one of intrigue!
Things I don't like(in no particular order)
Can't tag the raw file directly. I prefer the old way of adding keywords to the actual NEF file so that once each file is indexed, you can search or simply just see what it contains from the keywording embedded in the NEF file.
Again, no localised editing tools to speak of. LCH can help a little, but it's not really enough. Especially problematic for stuff like sharpening tho. Sometimes all you may want is a small spot of sharpening on the detail and not to sharpen blurred out or single solid colour areas as well. Major backward step from CNX2.
Slow, Slow as hell, tediously glacial and pretty much unusable in terms of speed.
I never really had issues with either VNX or CNX2 in terms of speed.
I recently updated my PC to modern-ish standards, and it's plenty fast for my uses.
In fact the old PC was too, but I felt a need to update at a reasonable cost.
CNX2 and VNX2 are now blistering! just about anything I do is instant thanks to very fast SSDs for cache and main system.
Images stored on the SSDs just happen instantly now in CNX2/VNX2, where they may have been a 1-2sec delay in CNX2 previously.
(note that my HDD speed has jumped from 100MB/s to 500-1600MB/s .. which explains it).
It's not coded well to run on a 4K screen. It works, but is difficult to view.
But CNX-D still refuses to play quickly. It feels(although I haven't yet tested) the same as it did on my old PC. New PC hardware specs are at least 4-8x faster/more in most respects than the old one.
I thought RAM may help so that it could cache more data into ram and operate more efficiently .. but NUP! .. nada! still slow.
I still persevere with it tho, mainly in the hope that one day it may actually become useful.
I do remember the old days when VNX was totally useless in many ways until they morphed it into VNX2 too .. so here's hoping.
OH! and I'm not being hard/harsh on CNX-D either! .. just truthful I think.
But I recently had this mad idea to have a peek at Sigma's SPP(v 6.something).
I was curious on their Fovenon sensor and X3F files.
it makes CNX-D look slick by way of speed comparison!
In browser mode SPP is OK-ish but does display some interesting anomalies(I'm going to look into one day).
A little convoluted tho when it comes to edit mode. it's not obvious how to get there or do it!
You need to open an new window and then another step to click on the Adjustments tool to reveal the necessary tools.
It's something you need to see to believe! .. and then we're talking a new level of speed restrictions here!
So if viewed from one perspective CNX-D is awfully hopeless(coming from CNX/VNX 2's) .. but when viewed from an outside perspective(ie. having now tried SPP!) .. it's amazing!