Woops, that's a typo. Pop music really never changed that much. There has always been good songs and bad songs in the charts. You don't know the bad songs from yesteryear because nobody talks about them, same counts for current pop music. Sure the fact that usually there are like 2 people who write all the songs so a lot of it the same and not rememberable at all but Bruno Mars, Ed Sheeran, John Mayer, Adele and Eminem to name a few still come around every once in a while and have some great songs in the charts. The 60s were lucky for having the Beatles(27 number one hits in 8 years of recording), Rolling Stones(8 number one hits in 7 years of recording (in the 60s)) and beach boys(2 number one hits in 7 years of recording(in the 60s) and that's just to name a few. Every decade has artists who topped the charts a lot and wrote great songs. There are just a couple things a song needs to become a pop song(don't bore us get to the chorus and more importantly really great hooks) and I think the way to be original doing that became harder so yes they don't play guitar, drums and bass anymore but electronic music is difficult to make just the same, it's still chords, rhythm and melody so essentially the creative process is the same.