Streaming services compress audio to 256kbps. That is fine for dialogue, but it ruins the bass drop when the Reality Stone (Aether) erupts.

was technically an upscale from a 2K digital intermediate. While it added HDR "pop" to the Aether’s malevolent red glow, some felt it wasn't a "leaps and bounds" improvement. The 3D Factor

Another reason users argue that is the definitive version lies in the completeness of the file. Many streaming services (Disney+, Netflix, Amazon Prime) use the theatrical cut—clocking in at 1 hour and 52 minutes.

The standard Blu-ray release typically includes the following features: Video Quality : 1080p High Definition video with a 2.40:1 aspect ratio Primary Audio DTS-HD Master Audio 7.1

The original 2013 Blu-ray release includes several "must-watch" supplements often highlighted in articles: Marvel One-Shot All Hail the King

A standard rip often compresses audio to stereo or low-bitrate surround sound. The BluRay version typically includes DTS-HD Master Audio or Dolby TrueHD tracks.