If you intend to play on a real Wii via USB Loader GX, you cannot use .nkit.gcz directly. However, NKit 1.4 includes a mass export tool.
The UX and ergonomics improvements are subtle but effective. Documentation aligns more tightly with the code; examples reflect modern use cases rather than contrived edge-cases. The CLI feels like an ally instead of a grumpy gatekeeper. These are the signals of a project that listens to its users and invests in their success. nkit 1.4 fully loaded