Another advantage of cartridges is that unlike disc drives, cartridges have a near-zero chance of damaging the media they are reading.
If Nintendo and Macronix truly collaborate on production for the NX, the new cartridges (based on new Macronix technology) could fit up to 32GB of storage.
For those who couldn’t catch the point of interest: Macronix has subtly implied that the Nintendo NX has a high likelihood of using cartridge-based games.
That said, cartridge media would certainly be an interesting move for the NX, even if it is an unlikely one.