[Xlythe]

It seems like it'd be possible to, instead of typing multiple exclamation points, have one trigger-character (eg. ). And then replace that character visually with an entire paragraph of text, assuming there aren't limits to the width of a character in fonts. I suppose the cursor and text wrapping would go wonky, though.

You could also use this to make animated fonts. An excuse to hook up a diffusion model next?

[Lockal]

"animated fonts" - not really; all meaningful applications not only calculate shaping once, they also aggressively cache the result (mentioned in https://robert.ocallahan.org/2024/06/browser-engine.html)

But things like this might be possible (for now): https://gwern.net/dropcap