A one-to-one mapping between standard plugs and standard wall power makes a lot of sense. But different standards of wall power should not share a single plug;

A one-to-one mapping between standard plugs and standard wall power makes a lot of sense. But different standards of wall power should not share a single plug; that's just asking for trouble. As for global standardization of wall power; maybe in an ideal world. But in reality, it would cost a ton (way more than merely replacing plugs and outlets) and doesn't seem worth it.