To overcome their small memory footprints? RS3, J&DII, GTA, & GTA:VC are the only games that utilize it that I know of. Is it inherently more expensive or difficult to transfer code & data this way? Given the PS2's architecture, it would seem almost natural. So why the shortage of software on these consoles using data on the fly? Or would devs. rather work within a systems' constraints than exceed them. (less work perhaps?)