what we have today on switch is essentially memory card, before it was an interface to the bus. You could do anything. It doesn't even have to be performance or

what we have today on switch is essentially memory card, before it was an interface to the bus. You could do anything. It doesn't even have to be performance oriented (or features like sound chips). One example is Boktai for GBA which had a light sensor on it so that actual daylight played into the gameplay, etc. I know hardware homogeneity across platforms brought peace upon gamedevs who are stressed out as-is, but I think we lost something major along the way.