I always am a bit anxious about the numerous times I have to swap the uSD card of the Switch because a single card just can hold so few games. I don't feel like the SD-card slot is intended for continuous swapping of cards. Now, the game cart slot on the other hand seems intended just for that and can be swapped without having to shutdown the switch, so my question would be: why is there no cartridge which itself can hold an SD-card, but inserts into the game cart slot and hence offers additional storage? That way your emunand and some other stuff could be on the normal uSD card in the Switch and that extra cartridge could offer game storage. Is this technically impossible or is it just that nobody has built such a cartridge yet? I for one would love to see something like that for sale ...