You can draw smooth, consistent glyphs, autotrace bitmaps, create overlaps, simplify paths, equalize stems, scale outlines while keeping stroke thickness. You can draw in fractional or integer coordinates, see view numeric and visual measurements, find & fix contour imperfections.
You can space and kern in multi-line tabs or windows that feel like a text editor. You can create, open, extend, test and export font families, variable OpenType fonts, color fonts and web fonts for any Unicode writing system. And you can interchange with other font editing apps, and collaborate with their users.