I grew up around a lot of juggalos. The music is kind of just a small part of the culture, it really is an entire culture, one based on acceptance of anyone. At least in the 2000s there wasn’t anything else like that. Old heads gatekept punk, they had officially declared punk was dead. Metal was mainstream. Eminem was the only “credible” white rapper because he had street cred from Detroit. If you didn’t feel like you fit in, the juggalos were there saying you’re welcome here. If you decide to call yourself a jaggalo, then you are, and you’re apart of the family. No interrogations about what music you’ve listened to your whole life, when you got into a specific scene, what socioeconomic background you have.
And yeah your second point about rap is 100% true. I saw $uicideboy$ come and go. I remember in like 2014 they were underground, I really fucked with them. They made over 500 songs, had a huge following for the time, and were doing great. Then they signed onto universal to release iwtdino or whatever in like 2018. Never felt more betrayed. I really fucked with yung lean too, but he straight up said he was going to sell out. He was gonna get money. I respect that. $B are just corpo shills now acting like they’re underground while being the most mainstream corpo rappers to exist currently.
I was trying to figure out where edm fits in to that but yeah, it was mainstream by the 90s. Started in the 70s, by the 80s there were defined raves for edm. But its hard to look at rave culture/edm as a whole since its so old and widespread. UK edm was different than US edm which was different than Latin American edm etc. Then all the divides within edm. House ravers didn’t want to go to hard style raves. Hard style ravers didn’t want to go to trance raves, etc.