I don’t know why, but it just seems so weird that you can go back 30 years and no one would have any awareness of a lot of songs that everyone knows today. They were only up to like Mambo Number 2 or Hey I’ll Think About It! Nickelback didn’t yet exist but if they did, they’d be singing to look at this thing they are doing right now, maybe take a photograph.
Go back 100 years and no one has any awareness of entire genres of music loved by billions today. It was almost an entirely different culture with popular hits like classical music, Take Me Out To The Ballgame, or You Are My Sunshine and other songs that are considered children’s music today.