Earlier quoted context omitted.
Windows came from the single-user domain. Unix came from server space. It is literally two different evolutionary paths. From day-1, Unix was built for shared file systems, multi-user accounts, and distributed computing. Networking on Microsoft was an afterthought until the mid-90's. Sure there were token ring and banyan vines drivers in the late 80's early 90's, but that was to share a drive letter. The entire idea…
Lots of FUD and misunderstanding going on there. Windows NT, which is what everyone uses, is a descendant of VMS design and culture, built for shared file systems, multi-user accounts, and distributed computing just like UNIX.
But still for a long time Windows NT made a lot of concessions to the single-GUI-user model that UNIXes didn't, like putting font rendering in the kernel.