One of the great losses since the late 20th century (probably ending at roughly 50s or early 60s) is that due to the limited selection of radio and TV programs, even large nations like the US pretty much shared a common musical heritage. I used to be that hymns and popular songs (e.g., "the great American songbook") were shared nearly universally in the US. Today, there are ever fewer songs that are even possible for a wide cross-section of society to join in on. And the Yankees just yanked "God Bless America" based on complaints from the whiniest of racists...