You should read the book Showstopper! to learn that NT was actually designed to be as far away from Unix as it could be. Dave Cutler, NT’s chief architect, hated Unix with a passion. He thought it was a rubbish OS. The internals are based on VMS, Cutler’s previous OS. That’s why NT has never been a good posix system and why microsoft has essentially given up with WSL2 and is now just running linux in a vm.
>>Joeri+(OP)
Great book. Another interesting wrinkle that’s been somewhat lost to time is that (as the book documents) NT was developed simultaneously on x86 and a RISC architecture (MIPS I believe).