[Hamuko]

The Nintendo Switch has sold 132 million units, so I'm not sure how niche that is. Presumably the successor is going to keep using microSD cards, and filesizes will increase in line with graphical capabilities.

[The_Colonel]

Cartridges are pretty popular, if only because you can sell / borrow them.

I have an SD card for the online-only titles, but it's pretty small IIRC.

But yeah, this still seems like a major use case for larger MicroSD cards.