[Leo137]

That's because you played Stepmania because you wanted to get the feel of DDR and score better next time you go to the arcade, and if you didn't had a dancemat, that keybinding goes perfectly to match the movement of your legs (crossovers are a thing in DDR and you cannot simulate that in spread).

As a similar case: Beatmania players when playing lr2 use to keymap the keyboard to match the pad shape (something like shift/x/d/c/f/v/g/b), even if you could say that the natural way to play lr2 would be a o2jam-esque config (caps/s/d/f/space/j/k/l)