The First Sony Walkman Was Released 40 Years Ago
The UX of cassettes was very useful for sharing and swapping music or speech, and for resuming where one left off. Because of the linear tape, the cassette's "playback cursor" was stateful and independent from whether the medium was read-only or not. Playback resumed at (nearly) the same spot as it was last stopped, even if moved to a different player. Successor formats didn't have this property.<p>Interestingly, Sony emulated the auto-resume feature in some Discman CD players, and later it became common in car CD players, but there was no way to maintain playback position after swapping players. Later, MP3 players maintained their own playback state, but getting tracks on or off the device's built-in or removable storage was with file-based interfaces that connected to computers.<p>This stateful cursor functionality is only returning these days with URLs to media-hosting sites that accept timecode parameters.