A font is designed to have certain attributes (e.g. harmony between the letters). It is not clear that this harmony is preserved if you distort the font algorithmically. For this font the designer ensured that it is preserved.

I get that part (I've designed commercial typefaces), but as I understand it, (1) this only works for type on circles or circular arcs, and (2) the typeface has no awareness of the circle/segment it's on, so the designer still has to manually match the Curve property to the radius.

I think this is really cool and interesting work by Nick Sherman. I just wonder if I'm correct about the limited applications, and what could be done to enable the kind of "contextual intelligence" that would enable fonts to better optimize themselves for a broader set of types of envelope deformations.