That was my first thought too. I read something a year or so ago about how cultural reference points fade over time, and as an example it highlighted the 20-somethings who don't know or care who Lennon and McCartney are. Quite a lot of them didn't recognize 'Imagine' when it was played to them. (I don't like Imagine myself, but me and every other Gen X-er on the planet knows it). So yeah, I do wonder how big the audience for holograms performing 'Beth' is going to be in 10 years.
I'd like to know the sample size of that survey. My 20 something, and all of her friends, absolutely know who Lennon, McCartney, and the Beatles are. Largely in part to that great arrangement of Eleanor Rigby from Cody Fry a few years ago. It was constantly on whatever station high school and college kids use for radio, used as a sound on TikTok, Instagram, and videos everywhere. Between that, Blackbird, and the more mainstream Beatles tunes heard everywhere I have difficulty believing this one.
Both of my kids (Gen Z and Gen Alpha) know tons of older songs. As a jazz musician, I have absolutely no influence on their popular music taste... but I constantly hear the youngest playing music from ABBA, Michael Jackson, Nirvana, Bowie, 80's Hyperpop, Skynyrd. Stuff I would never expect her to listen to. There's also a new wave of young musicians playing some cool 80's influenced alternative stuff that's mostly in Spanish but has a cool sound and she listens to that a bunch too (she's bilingual).
The Gen Z daughter listens to a lot of the above, but has also gotten into classic country (Hank, David Allen Coe, etc...). I blame that on her being away at college and keep thinking maybe it's a phase. She also loves Rocky Horror, Selena, and of course Spinal Tap (mea culpa).
However, I don't recall either of them sharing any knowledge of KISS.