Re: "286 could have run a pre-emptive multitasking OS"
But no OS can prevent by passing security on any Intel processor. The fact you could run an pre-emptive multitasking OS on a 286 does not mean it would be secure. To be secure, you need to have a guard register at both ends of memory for each process, and prevent any cross over access. Intel does not provide hardware support for that. That is because guard registers are for segmentation, and Intel uses the word segmentation for their bizarre form of over lapped paging.
Biting the hand that feeds IT
