WinNT in that era was a microkernel that ran the GUI outside of kernel mode and it was just too slow and too much overhead (copying datastructures etc).
Win95 GUI subsystem relied heavily on large shared memory segments and running things in kernel mode. Less safe, but less overhead. You don't need to copy bitmaps around because the GUI can just read them straight out of app RAM.
Win95 GUI subsystem relied heavily on large shared memory segments and running things in kernel mode. Less safe, but less overhead. You don't need to copy bitmaps around because the GUI can just read them straight out of app RAM.