What? Apostrophe is U+0027. The distinctions created by these extra Unicode characters will never be faithfully reflected in most text, because English speakers only have one key to type them with and don't care.
The author's point makes sense to me. I agree and my initial thought is that the correct thing to do is recommend U+02BC be the apostrophe.
This is something for the future. It won't be faithfully reflected in text for years or decades.