Gen Z keeps thinking they've discovered something completely new, when it is the same thing that worked for radio and tv broadcasting for the better part of a century...
If you find something that is new to you, and useful, but you discover that it actually is decades old; would you then discard it simply because it wasn't new?
I think that people that scoff at younger generations, dismissing new things because "back in my day…", simply are out of their time; and bitter about it.
Yes, perhaps you did have some favourite FM or AM station that you used to listen to back in the day, and yes, maybe people did call in; and yes, maybe Clubhouse reminds you about that whole thing. But Clubhouse isn't that old thing; and the way that you have rooms and profiles and essentially unlimited "stations" and anyone can start a "show" and and and… If all you can get out of that is a tired old "back in my day" tirade, then I feel sorry for you.
You don't have to like a new thing, you don't have to use a new thing, you don't even have to understand it; but it makes you one miserable old git if you keep dismissing anything new, and people like that tend to become very lonely when they get older. They tend to simply not be pleasant to be around; and they tend to get worse for every year passing.
Just imagine being a young(er) person coming to an older relative excited about something new in their life, that brings them joy, only to be met with a rude and dismissive "that's stupid, because when I was younger"… And now compare that with the joy of that kid instead being met with a "hey, can you explain how that's different from the [thing] that I grew up with?".