> There are rather few legitimate uses of some zero-width characters, like ZWJ in emoji composition.

Emojis are another abomination that should be removed from Unicode. If you want pictures, use a gif.

Arguably them being in Unicode is an accessibility issue, unless we thought to standardize GIF names, and then that already sounds a lot like Unicode.

How is it an accessibility issue? HTML allows things like little gif files. I've done this myself when I wrote text that contained Egyptian hieroglyphs. It works just fine!

I mean if you don't have sight.

Then use words. Or tooltips (HTML supports that). I use tooltips on my web pages to support accessibility for screen readers. Unicode should not be attempting to badly reinvent HTML.

( ꏿ ﹏ ꏿ ; )