Interestingly, a very awkward situation occurred with the USB Type-B update to the USB 3.0 era. In the introduction of Type-A interface, we found that the space within the initial generation of Type-A interface is very abundant, so the extra 5 pins directly "squeeze" into the original designed interface without any changes of the size or the appearance of the USB Type-A face. On the other hand, the USB-Type B, perhaps the original designer did not even consider that it will be updated, the narrow internal space for the extra five pins have nowhere to put. So the USB 3.0 version of Type-B was given a "crown" to accommodate the five pins.

