Is there a way to cache/save all (or at least a few) songs offline (Wii U internal memory, SD, USB) and avoid the time limit to have "infinite success" to the game? The reason I'm asking is rather that I'm afraid of Nintendo turning off the servers one day than piracy intents. This is a game I'd like to have "forever". Even in 10 or 20 years. I don't expect the servers to be online that long after NX release.