[Nomentatus]

Compare visual compression schemes such as .jpg - they too produce nasty artifacts if you compress an already compressed file. Something plenty of people don't realize. (You need to go back to the .raw file or at least a really big .jpg and compress that more strongly.) Sure, .jpg and .mp3 could have a bit of AI to recognize already-simple or compressed files, but that's another chunky feature that doesn't affect their main use case; and .mp3 was a commercial venture. Every program can always be better, but as the old quote about art goes, no painting is ever finished, only abandoned (in a good-but-imperfect state.)