Cultural Shift - music

I grew up in the seventies and eighties. Even then there had been a large cultural shift in technology. Since then there has been another shift.

Music had changed from radio and records to 8-tracks and cassettes. Now it has changed to cds and mp3s. Transistor radios allowed people to not have to sit by the old floor radios.
We had shifted to Walkmans and boom boxes which allowed us to take the music we wanted with us but there was always a limit of battery length and quality of sound – the walkmans and even later Discmans were bad for speed changes if jostled.
Now the shift is for ipods and mp3 players – which are tiny, have a great quality of sound, and can store days of music. Bill Cosby used to joke that, as kids, they always used to hum their own theme music – people today can actually score their life.