I personally have all my 2160p HDR HEVC movies in a separate library. I've mapped my i5 3570k CPU and a GTX 760 GPU correctly so that emby makes use of them in the official Docker container but still they don't hardware transcode the 4k HDR content. I suspect I'd at least need a GTX 1050 for that.
So what I would wish is that I could prevent transcoding of my HEVC library as my hardware can't keep up if one of my users want to play those movies in the web player. The reason I'm not disabling the library completely for my users is that they still can play them with the Emby iOS/Android apps. Thoughts?