I judge all music by whether or not you could kill a Pet Shop Boy with it, what else is it good for? Nah, I think it's interesting to think in terms of decades, or even double decades - this is all speculation cos I wasn't around for most of it and certainly didn't have a time machine, but I think there's lots of music from the 1960s that would sound incredibly alien to someone from the 1950s or 60s, and similarly for the 70s, 80s and so on. I like Death Grips, but if you had access to a time machine, I dunno how mindblowing they'd be to a reasonably up-to-date early 90s music fan who dabbled in hiphop, industrial and punk/metal. So the hyperpop thing was shorthand for "if you put on a playlist of stuff from that genre and played it to someone involved in 80s electropop, how much of it would sound genuinely weird and incomprehensible, as opposed to just techniques that they'd be familar with but hadn't taken in that particular direction?"