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.
This stateful cursor functionality is only returning these days with URLs to media-hosting sites that accept timecode parameters.