Just using an SD card requires modding your Switch to run homebrew and, er, "backups," right?
A properly constructed cartridge that can masquerade as a retail Switch cartridge would make owners who aren't willing to modify their console very happy indeed. That's how the various NDS/3DS carts work -- just plug and play (literally).
Not sure if running from the cart slot is permitted to even detect anything not properly signed by Nintendo. Which means this one is squarely for "backups" and nothing else.
That's what a flashcart is. It's a cartridge with an SD card in it, which has game ROMs on it. You can see a microSD card in the flashcart in the video.
Because then you could buy any old SD card and Nintendo makes no money from you. This way Nintendo can sell you the same NAND flash except wrapped in a propriety Nintendo container with the multiple orders of magnitude price increase to pad the bottom line. They can also pursue you for civil or criminal charges if you attempt to break into the container of flash charging you with copyright infringement and attempted hacking.
Edit: ignore my post. Its not a Nintendo first party product.
Lol, you've made some assumptions there. It's not a Nintendo product. Nintendo would NEVER release any kind of flash cart themselves, as they're begging to be used for pirated games.
Everything you've said about game carts are basically why we'll never see an officially licensed product like this from Big N themselves.
With that in mind, it still makes no sense as a product because you can run games off the SD card already (I assume. Very out of touch with Switch hacks)
In the video that was posted, the user testing the card is manually inserting and removing the card in order to cycle through the different games on the cart.
It appears it cannot run unsigned code, as it doesn't have a menu. This is probably similar to the Sky3DS. It behaves like a real cartridge, so it would only run pirated cartridges. No DLC or homebrew.