Mouse is slower than the keyboard. It requires focus and precision. Mouse is more finicky in many environments which are not a surface which is not a stable, f

Mouse is slower than the keyboard. It requires focus and precision. Mouse is more finicky in many environments which are not a surface which is not a stable, flat, non-reflective, non-moving, non-vibrating desk. But most importantly, moving the arm from mouse to keyboard, back and forth, over and over again, creates much strain, which translates to pain and long time-outs.