With 400plus i loved the function to take series of pictures (for example 10). With Magic Lantern i can use intervalometer to set the number of pictures in steps of hundred. From my point of view a configuration with numbers of 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, endless would make this possible. It gives more flexibility and the access to the rough number of pictures is faster.