I do wonder if the sudden comeback of eurohouse and other similarly mawkish styles of music is a result of young people who run clubnights playing more hyperpop and nightcore in their sets. Some of the events i have witnessed have been leaning into it so far that you'll hear all types of twee japanese computer game breakcore and k-pop next to your Sophie's and 100 gecs type stuff and the dancefloor will be going off.
I noticed that previously respectable d&b djs who are maybe mid to late 20s will be incorporating happy hardcore and cheesier jungle techno into their sets, whereas the 18-25 jungle djs are often just straight up playing toytown happy hardcore, gabba, 160-200bpm remixes of the absolute cheesiest pop songs.
So it would make sense for people who are plugged into the scene to be taking notice of what young people are actually embracing on the dancefloor, and then try to incorporate some element of it as either an entry point, or just to feel like they are staying current.
this jives with my old guy impression of younger, especially queer people, here in Chicago
I don't go to any shows very often but when I do they're usually diy hardcore (the original kind - punk - tbc, not happy, or gabber)
and idk about other places but here there are long-running crossover threads between punks and dance music
so DJs often play between bands and it is usually a fucking endless barrage of happy hardcore and melt your face acid techno stuff
which as you say seems to be trending recently more toward happy hxc, toytown, intense cheese over the banging, brutal, etc
and I get the further impression from people more in dance music proper that that's the case there as well but idk how much exactly