Comment by adgjlsfhk1

Even for pre-digital era movies, you want film grain. You just want it done right (which not many places do to be fair).

The problem you see with AV1 streaming isn't the film grain synthesis; it's the bitrate. Netflix is using film grain synthesis to save bandwidth (e.g. 2-5mbps for 1080p, ~20mbps for 4k), 4k bluray is closer to 100mbps.

If the AV1+FGS is given anywhere close to comparable bitrate to other codecs (especially if it's encoding from a non-compressed source like a high res film scan), it will absolutely demolish a codec that doesn't have FGS on both bitrate and detail. The tech is just getting a bad rap because Netflix is aiming for minimal cost to deliver good enough rather than maximal quality.