One big problem with this interpretation: expressivity is severely limited with computer text compared with handwriting where you can do what you want, and Unicode is about encoding what already exists, not creating anything new. You could say things like emoji skin tones are an exception to that rule, but modifiers are very limited in Unicode due to how it’s all implemented, and can’t develop in the way described near the end.
I think the color variations and joining characters should be allowed without limit or reason, and up to the font if it wants to support an amalgamesh of fifty five different “people” emojis in twenty colors.
It's just a lot slower at invention than a scribe can be.
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