- Allow for "freezing" OpenType features (see https://twardoch.github.io/fonttools-opentype-feature-freezer/)
- Autohinting
- This is tricky because we may need different autohinters for CFF/CFF2 and TrueType outlines
- Preview the glyphs in a font
- Preview font features (see https://fontdrop.info/)
- E.g. for stylistic alternates, use HarfBuzz to optionally gather which characters they apply to
- Make use of the data in https://github.com/google/fonts/ for font preview text, axis descriptions, etc.
- Support the new incremental font transfer standard
- Probably should wait for it to be actually standardized though
- Use the feature tag info registry more (show explanations of font features)
- Drop legacy
kerntable if HarfBuzz doesn't already - Use the Google Fonts repo's style tags in the browser
- Let the user specify names for custom instanced axis values (for instance, instancing opsz to
8, 32could be8, 32@'Display'to name the 32pt one "Foo Display")