[krono]

Yes, I see what you mean, but if that's really the intent, then having only this font-family rule isn't sufficient. For that argument/reasoning to hold up, it would have to be accompanied by metrics adjustments to compensate for the massive differences between some of the listed fonts in these stacks.

[leephillips]

Absolutely true. In fact (and thank you for getting me to think about this), font stacks without metric adjustments don’t really make much sense, do they? (Unless confined to a list of fonts that are very close metrically, which they never are.)