Optical kerning is great, and a good discussion here. I'd like to go back to the another of the ideas suggested in the original post here: font management.
I'd like to be able to group fonts. As a minimum, I'd like all the fonts of a family to be grouped and appear as a single item in the font menu, with a sub-menu perhaps for the variants of that font (regular, italic, bold, small caps, etc etc). That would massively simplify what is a very cluttered part of the AP interface right now.
The idea of having user-defined font groups is a nice one, but perhaps that's too much to expect. Pinning particular font families, or having the most recently used or the most popular at the top would also be nice. This could be just for this AP file, or for all AP usage, or indeed for all files (if that info were available) -- I'm thinking about howmacOS presents Finder and file info, with a list of the current folder and a list of recent folders, and this info is shared across all apps. I accept that this info is perhaps just not globally available for fonts. These are nice-to-haves. But basic font family grouping (and hiding of individual fonts into a sub-menu) is a Should-have feature, in my view.