"If you gaze long enough into an abyss, the abyss also gazes into you." That's Nietzsche. Having died in 1900, he didn't live quite long enough to see the PyottDesign Statial.b (via Hackaday), a mouse that can be adjusted in more ways than I thought possible. If he had, he might have instead said, "If you spend too long developing a completely adjustable mouse, stop."
What Nietzsche arguably meant by his abyss comment is that if you spend too long searching for meaning by contemplating an ultimately empty reality, watch out—because this could end up making you empty. This mouse makes me wonder along similar lines: if a mouse spends too long trying for a very human-usable design, might it not become too inhuman?