A major issue: the level (Chapter 4) still has a memory leak that causes stuttering after 20+ minutes of continuous play. A quick save/restart fixes it. This is present in all ports, not just Switch.
From a preservation standpoint, owning a legitimate Ninja Gaiden Sigma 3: Razor’s Edge NSP means you can keep the game on an SD card, avoid cartridge swapping, and benefit from the latest patches (1.0.2, which improved framerate and fixed input lag). Ninja Gaiden Sigma 3- Razors Edge Switch NSP ...