[rasmusfabbe]

This is valid commentary and subject to much discussion throughout the recent history of typography. There's always a blance condition between personality, legibility, character ambiguity, pace, and so on. Every typeface needs to go in some direction on these dimensions, which is why we have different font families for different uses! For instance, mono-spaced fonts with "slab" serifs are popular with computer code since column alignment (mono-spaced) and ambiguity (slab serifs and other visual traits like slashed zero) are used. However, for most people it's easier to read a variable-width font with regular serifs for longer text, like what you'd find in a book. Similarly, for user-interface labels, dialogs, buttons, etc it's often better to use a font without serifs and with a little more tracking/letter-spacing than what you'd use for large bodies of text (e.g. in a book.) Interface is designed for the latter use-case; user interfaces on computer screens.