Several Genesis games used flash memory and most are still going. But I have a feeling it's going to be hard to keep DS hardware working well in the future, I can't see how to clean the connectors in the consoles and there's no cleaning kits made for them. The carts have those ridges which make them a pain to clean, I've already had to clean some games to get them to work right. I've never cleaned a sytem though as I haven't figured out how yet.