When you've had streaming all you life, in Gen. Z's case - both Radio & Physical Media are mysteries...I had to explain that when you pick up a CD (younger Gen. Z and older Gen Alpha calls them "DVDs"), that they were "holding music", that the music was on the Disc, molded into the plastic of the disc, that you paid for it once and it was yours forever, that it didn't need WiFi or 5G, that it was read by a laser & they looked like they were confused, then like I might be lying or that I might be making fun of them.
When all of your life, everything has been on Paid Streaming Services, the very idea of Music being Physical, like a CD, or the idea of FREE Music over-the-air, it just isn't even in your Worldview, it's a foreign concept.
Gen X confuses me though, why wouldn't they be aware? They're older than I am!
EDIT: Apparently, I didn't know where the various Generations landed that well, I'm very close to being one of the oldest possible Gen. Z, rather than one of the youngest possible Millennial. Gen-Z is actually making the CD and 2000s culture come back into fashion, I was talking about an older Gen. Alpha. FM though? Foreign concept still.