There will be no undoing of anything, fortunately. Unicode is committed to complete backward compatibility, to the point where typos in a character name are sup

There will be no undoing of anything, fortunately. Unicode is committed to complete backward compatibility, to the point where typos in a character name are supplemented with an alias, rather than corrected. Han Unification was an unforced error based on the proposition, which was never workable, that sixteen bits could work for everyone. This is entirely Microsoft's fault, by the way. But it shouldn't be, and won't be, fixed by breaking compatibility. That way lies madness. There are two additional planes set aside for further Hanzi, the Supplementary and Tertiary Ideographic Planes, the latter is still mostly empty. Eventually the last unique ideograph used only to spell ten known surnames from the 16th century will also be added as a codepoint. I view the continued use of Shift-JIS in Japan as part of a cultural trend, related to the continued and widespread use of fax machines, or the survival of floppy disks for many years after they were effectively dead everywhere else. That isn't at all intended as an insult, it's that matters Japanese stay within Japan to a high degree. Japanese technology has less outside pressure for cross-compatibility. Shift-JIS covers all the corner cases of the language, and Unicode has been slow to do likewise, and it isn't like Japanese computers don't understand UTF-8, so people have been slow to switch. It's the premise of "unaware of how it works in the rest of the world" that I object to. It's really just Japan. Everywhere else, including the Chinese speaking parts of the world, there's Unicode data and legacy-encoded data, and the solution to the later is to encode it in the former.