I can't speak for the OP but the main reason for me would probably be nostalgia. The second reason is that I could probably download every single ROM ever prod

I can't speak for the OP but the main reason for me would probably be nostalgia. The second reason is that I could probably download every single ROM ever produced for these systems and store it on an average sized flash drive. Finally, I don't know much about pirating on the 360 but I'm personally not inclined (read: lazy) to mod an XBox.