A: For most users, NSP is considered the superior format because it can be used to install not only the base game but also updates, DLC, and homebrew as a single, unified package. XCI is often seen as more "convenient" for drag-and-drop play, but requires separate NSP files for updates.
: To discourage "item bagging" (staying behind to get strong items), Nintendo made it impossible to acquire powerful items by stopping or driving in reverse during a race. mario kart 8 deluxe switch nsp xci update 30 new
Let me break down what "30 new" likely refers to: A: For most users, NSP is considered the