I explicitly mention exactly this in my comment, and provide an example of where it breaks down. The point, which I also heavily noted in the post, is that it's

I explicitly mention exactly this in my comment, and provide an example of where it breaks down. The point, which I also heavily noted in the post, is that it's a litmus test. If a language can't pass the iterate-over-code-points bar, do you really think it would give you access to characters or glyphs?