Re: Google’s NT You mean BSODs? Actually, no
You keep saying that but the context switch time is a function of the hardware and X86 of any type is appallingly slow at doing this.
NT 3 as designed by Dave Cutler depended on the context switching speed that a VAX processor could provide. This was heavily assisted in the VAX with a dedicated block and register to speed the switch up.
The 4 modes of the VAX, kernel. executive, supervisor, user, these were all used.
The X86 family have this as well but only kernel and user are used because the context switch speed is stupidly slow.