It wasn’t just that it physically fit in your pocket - it also worked in your pocket. I had pants at the time which I could fit a portable CD player in, but wal

It wasn’t just that it physically fit in your pocket - it also worked in your pocket. I had pants at the time which I could fit a portable CD player in, but walking around without the music skipping required carefully holding it steady. The earlier non-flash mp3 players tended to have HDDs that similarly weren’t great with motion while in use.