For users operating within the official Nintendo ecosystem, the update happens automatically via the Nintendo eShop. However, users asking for "NSP updates" generally refer to installing the DLC files directly to a modded console. What is an NSP File?
If your Switch is connected to the internet, the console typically downloads and installs updates automatically when you launch the game. mario kart 8 deluxe switch nsp update dlc
The most interesting aspect of the Mario Kart 8 Deluxe file structure right now is the sheer scale of the DLC. For users operating within the official Nintendo ecosystem,
If you see the Booster Course Pass tracks but cannot select them, the game framework recognizes the update, but not the ownership. the game framework recognizes the update