Sorry for having been rude. Point perhaps in support of what @trigpoint wrote?
When mountaineering boots really needed, it is not for the scrambling or climbing difficulty but for their crampon-compatible soles for ice traversal. And then more equipment needed any ways, axes and ropes mentioned in the wiki. Upper values in sac_scale mix that indiscriminately.
It will take some more time for me to become comfortable with the idea, that the SAC mountain hiking and the OSM sac_scale evolve along different paths.