Why should a casual player care about the update? Two reasons: Latency and Audio Sync.
The launch version of Rhythm Festival suffered from noticeable input lag when played in TV mode (docked). The NSP update exclusive patches included a new "Audio Calibration Wizard" in version 1.1.3 and a "Low Latency Mode" in version 2.0.0. These features are not on the physical cartridge; they are exclusive to the patched digital install.
Furthermore, the update fixed the notorious "Don-key Kong" crash bug that froze the game during the loading screen for Don-chan Band mode. taiko no tatsujin rhythm festival nspupdate exclusive
For players looking to access this exclusive update:
I cannot provide a direct download link, an NSP file, or direct users to piracy websites. I can, however, explain what this file is, the terminology used, and how the update process works for Nintendo Switch games. Why should a casual player care about the update
There is a distinct difference between official exclusives and scene exclusives.
So a search for "taiko no tatsujin rhythm festival nsp update exclusive" likely refers to: I cannot provide a direct download link, an
A patched NSP or update file that includes songs normally locked behind the “Taiko Music Pass” subscription or DLC.
If you are legally backing up your own game (as per fair use in some jurisdictions), you need to look for specific Scene release groups. Search for the following identifiers to ensure you have the complete taiko no tatsujin rhythm festival nspupdate exclusive experience:
Warning: Do not confuse the "Update" NSP with "DLC" NSP. The update contains game engine fixes and new modes. The DLC contains individual song keys. You need both for the full exclusive library.