In short:
The "Mahoraga vs. Sukuna Blu-ray Repack" became a cultural meme and a sought-after file because the animation style of Episode 17 ("Thunderclap") is highly susceptible to compression degradation. The repack offered the viewer the intended visual experience of the animators without the need for downloading raw ISO files often exceeding 20GB.
It adds approximately 1 minute and 20 seconds of new animation between frames that were previously disjointed. New sequences include Mahoraga getting hit by an airplane, a pool-side confrontation, and a high-speed battle across an overpass.
To understand the significance of the "Repack," one must first understand the technical hierarchy of anime digital releases.
However , be cautious of fake "repacks." A true has specific file sizes (usually 2.5GB to 8GB for 1080p). If a file is under 500MB, it is not a repack; it's a re-encode of a stream. Look for groups known for quality (e.g., Judas, Cleo, Beatrice-Raws).
If you want the experience: