So they themselves claim. Will wait for empirical tests with available codecs to really evaluate this. Also note that for a given bitstream specification, there

So they themselves claim. Will wait for empirical tests with available codecs to really evaluate this. Also note that for a given bitstream specification, there will be "room to grow" for encoder implementations (AV1 is designed to be flexible in this way). I am not aware of any precise method for evaluating how much room exactly there theoretically could be ex ante.