Classic rock used to mean Led Zeppelin, Pink Floyd, and the Who. But now it looks more like the Red Hot Chili Peppers, Foo Fighters, and even Blink-182. How did this happen? Steve chats with Rob Harvilla of The Ringer about how alt-rock has slowly evolved into the music that you hear at gas stations and local county fairs, and whether this has been a natural change or remains strange.