As this poorly-informed outsider understands it, the bulk of writing is kanji, which is sort of equated with literacy, and hiragana is only used to spell out wo

As this poorly-informed outsider understands it, the bulk of writing is kanji, which is sort of equated with literacy, and hiragana is only used to spell out words which don't have kanji or to accommodate children (or maybe foreigners?) who are still learning kanji. I don't know why katakana hasn't been eclipsed by hiragana. I wonder how much of this is due to the complaints that Japanese was not well served by Unicode's Han unification. I would have liked the article to touch on that.