Maybe someone could explain to a font-illiterate what is different about a new font like this, why do people keep making new ones, and won't all new ideal, clean, readable fonts converge to be indistinguishable from each other because they have the same requirements?
What's considered "ideal" changes. For UI typefaces the medium they're used for has changed (HIDPI screens are the norm now), so it's causing a small renaissance of type design for screens.