A great article that taught me a lot of history. As a long time Linux user and advocate for that history, I learned there is actually a lot to appreciate from the work that went into NT.
The original NT was a great design, built by people who knew what they were doing and had done it before (for VMS). It was superior to the Unix design when it came out, benefiting from the knowledge of 15 years.
I worked on kernel drivers starting in with NT 3.5. However, over the years, the kernel has become bloated. The bloat is both in code and in architecture.
I guess this is inevitable as the original team has long gone, and it is now too large for anyone to understand the whole thing.