Mostly about effectivity vs. efficiency in terms of game programming.
This is exactly what came to my mind when I tested the new cartridge today. It's astounding what this little constructural difference results in. I got an improvement of about 2 meters or so, just by giving it more freedom in rubber contraction. I wonder... It could make all the differences to completely remove anything that might come in the rubber band's line... Gonna test this for sure.