> Apple Books and everything else Can't speak to Apple Books, but at least Pages.app (and iWork in general) use a separate text engine from TextKit, focused on

> Apple Books and everything else Can't speak to Apple Books, but at least Pages.app (and iWork in general) use a separate text engine from TextKit, focused on higher fidelity at the cost of performance -- optical kerning, etc. (Terminal.app also does not use TextKit.)