It allows additional options _in between_ those listed. I'm skeptical that such an ill-defined rationale-centric change would hold any purchase with modern com

It allows additional options _in between_ those listed. I'm skeptical that such an ill-defined rationale-centric change would hold any purchase with modern compiler-writers (it is certainly arguable what points lie "between" qualitatively-described behaviors), but in general a range does not usually include literally all possibilities.