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These bands last for mere moments, we're lucky to have seen and heard any of them. But there will always be sad/angry/confused teenagers making music, so there will always be something new to discover. I saw Knocked Loose right before covid hit, and while it's not really a style of music I like, I figured that they were playing in my neighborhood at a venue that usually has good shows, so I dragged 2 friends, a 30-something french woman who's mostly into Deftones and Korn and some R'n'B as well and a 20 year old kid directly from China here to study chemistry. We all had a blast at the show, it's just a unifying moment to be in a room with a bunch of strangers yelling and jumping around and being free, and something that's timeless and genre-less. I try to enjoy it all.
And on the topic of bands I never saw... When I was a teenager I religiously listened to the local college FM radio station. From 10-midnight, they would play rap, then at midnight, it was the "hardcore" show. But it was this super softspoken guy who played a great mix of punk, hardcore, early emo/screamo, and some other weird things. If I had a blank cassette I would try to tape it and then ask my "cool" adult family friends who worked near a good record shop to ask for any of the bands I could remember from the show.
I remember I had one tape that I'd recorded from the broadcast that started with Husker Du "Something I Learned Today" then went into some early screamo-ish music that completely blew me away.
Swing Kids... into Fingerprint... into Constantine Sankathi
And I remember when he said "and that was a Constantine Sankathi... I guess that's hardcore, or whatever we're calling hardcore these days...", haha. It was something that was constantly changing, and will continue to do so, I think it's pretty great. And it's crazy to me that I still remember this radio show I taped probably 25 years ago, haha.