I disagree with the whole "NEED VISUALS OR GRAPHICS?" section. I do need visuals! I do need graphics! I'm not a typewriter, why must my flow be interrupted with me having to leave my document to open some JPEG file whenever I need to show something that isn't text? It's not like this is crazy difficult or requires proprietary apps either. Writing a modern browser may be an impossible feat but I'm certain that it woul…
https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
This tells me you've never actually tried this. For example the img tag allows you to, amongst other things, render an svg.
If you want a more full spec you can see here what it takes to render an img element: