Ah yes, that’s surely what I am conflating! I didn’t think the phantom stack idea was that great (but it was just an idea worthy of a working paper, so no big

Ah yes, that’s surely what I am conflating! I didn’t think the phantom stack idea was that great (but it was just an idea worthy of a working paper, so no big deal). Also I really don’t think spaghetti stacks were so great in retrospect, especially when implemented on modern architectures that lack the lightweight stack support of the PDP-10 which probably inspired the design.