t0350's comments

Guys who made things that have a zillion inter-related modes actually spent few effort to convert the "model" to a truly conceptual model which should be much simpler or as you said, orthogonal. And I believe that this is where the complexity lied in.

You could also implement something likes software isolated process to have memory safety. However, the idea of virtual memory really fascinates me. Such an elegant layer and it brings you many other merits besides memory safety.