The amount of unused exploitable redundancy in typical video content is still massive, we just need better ways of of finding it. A lot of the constant improve

The amount of unused exploitable redundancy in typical video content is still massive, we just need better ways of of finding it. A lot of the constant improvements is just that the amount of compute that is reasonable to use keeps growing, and so new codecs that are balanced around ever slower algorithms keep getting developed. I'm not saying that there is no new inventions -- plenty of useful tricks keep being found, but most of the difference of AV1 and what came before is just that the developers thought it was okay to spend more on search.