You are thinking from gaming PC centric perspective. The article says "their tool works by statically recompiling N64 binaries into C code that can then be comp

You are thinking from gaming PC centric perspective. The article says "their tool works by statically recompiling N64 binaries into C code that can then be compiled into native apps for any platform". N64 emulators have poor performance on things like raspberry pi or anbernic handhelds which have ARM64 chips in them. This would allow you to natively compile an N64 game to ARM64 to get better performance on less powerful but more portable devices.