Comment by dredmorbius

That would be interesting to see. An a possible way of extending current typefaces through the Unicode glyph-space.

Thought I'd had earlier: there's a lot of detail that goes into font design, particularly anticipating issues with specific media.

E.g., faces meant for wet-ink print often incorporates features to avoid pooling or smearing ink ("ink traps", see: <https://en.wikipedia.org/wiki/Ink_trap>). Electrostatic printing (a/k/a laserprinters), and screen-based displays (CRT, LED, Plasma, eInk) also have idiosyncrasies which fine-detail font design may take into account.

I'm not sure those would be hugely significant, but seem a domain in which a naive AI font designer might prove deficient.