I believe you are talking about the 'anime' encoders, as for 'scene' releases, they are all in 8bit h264 AFAIK. Also when it comes to anime, doing a quick sear

I believe you are talking about the 'anime' encoders, as for 'scene' releases, they are all in 8bit h264 AFAIK. Also when it comes to anime, doing a quick search on Nyaa it looks like 10bit is used on less than a tenth of releases, with h265 being in that same range as well. I dare say 8bit h264 is still the undisputed king of piracy.