Comment by SirMaster

That's not my experience at all.

I mean I've gone all 4K/HDR a number of years ago, and all streaming 4K and disc 4K is HEVC. So all the piracy content is WEB-DLs or UHD disc rips of that and it is often not re-converted, but even if it it tey still use HEVC.

H.264 is a fine codec, but it doesn't support HDR and also really starts to show its weakness in efficiency at 4K resolution. At 1080p SDR it fairs much better vs HEVC.