Because you're tossing approachability out the window. Even for seasoned users, when you're typing with urgency or precision you miss having a clearly labeled,

Because you're tossing approachability out the window. Even for seasoned users, when you're typing with urgency or precision you miss having a clearly labeled, discreet key to press. And good luck using a friend's weird keyboard in a pinch. (I am a user of multiple weird keyboards.)