As far as I know, Unicode inherited theses characters from legacy East
Asian character sets/encodings primarily for round-trip compatibility
with existing content. For authors who are not familiar with the
history of character encodings, `fullwidth` is completely opaque and
meaningless. That’s most of them, at least outside China, Japan and
Korea. Yet, Europeans, Africans or Americans used only to the roman
script might still feel tempted to use these counter styles.
I believe the circled ones are okay, the rest should not be used, at
least not in Western texts.
See https://github.com/w3c/predefined-counter-styles/issues/6 Please do NOT reply to this email. If you'd like to contribute to the
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