It's more "visible". The pseudo analogic displays are always preferred to pure digital. I agree, the 5 minutes to formation lap signs could be actually replaced by a numeric timer, but you need a BIG display. But you can easily see that only 3 lights are on, from 100 meters distance, while you need to focus your attention to read 4'12", and the precise time isn't that important anyway. Besides, you can always consult your wrist watch..