The problem for you in the future, Bob, is eventually you will have a new system — Mac OS 13 or Windows 11 or whatever — and CNX2 will no longer load nor run. It;s not the NEF format that is the risk, it's Capture NX2. But as I said, that's a future problem.
But let's look at the incremental development of features. You say CNS2 is fully working and imply that it keeps you happy. That's fine, it kept me happy for a long time, too. But here's the key: WHen I left CNX2, Lightroom 3 kept me happy. Lightoom 4 makes me happier. It does is a better raw processor than LR3.
Some years ago you probably read that one great advantage of the RAW file — the digital negative — was that in the future, as software improved, you'd be able to go back and re-develop your older RAW files and obtain better results. That is now happening with Lightroom and various other RAW converters. They have improved over time. Capture NX2 has not improved core processing; it is years old and CNX3 is not in sight.
Just my humble opinion…
Jon Kandel A New York City Nikonian and Team Member Please visit my website and critique the images!