Music.

Music is cyclical but also it loses aspects/styles as time goes on based on changes in society for example, we will never have another Chopin, Mozart or Beethoven again because back in their time life was not as full of activity as it is today. All those guys had was music so being that they were prodigies they could focus entirely on the music hours after hours of music. There were much fewer distractions than today's world. I feel that music of today is just as enjoyable but different when compared to music 20 or 30 years ago but new styles/genres with different uses of experimentation will always be happening so I'm sure the future of music will continue to be an evolving and amazing process.

EDIT
Oh yeah and by any chance did you play on the 907th day of defeat clan/guild?

Jam it back in, in the dark.