But if you want to do the traditional thing (design a separate glyph for every code point), isn't that still a similar amount of work? I'm not that deep into d

But if you want to do the traditional thing (design a separate glyph for every code point), isn't that still a similar amount of work? I'm not that deep into designing typefaces, but I'd expect that many designer already work in a similar mode like GP suggested. The only difference is that you'd encode the ruleset instead of the outcome.