Audio cassettes might make for a fun gameplay addition: Add maybe a dozen cassette exclusive songs to the game*, that the sims have to track down. Cassettes can turn up at the flea market (CL), in trash cans (EL, basegame) or via online trading (Plopsy or a new computer menu). They'd come in different states, similar to foods, that give different moodlets from listening to the songs. Once a sim has acquired their first cassette, they can buy a multipurpose player that comes with the option to listen to the cassettes as-is or digitalize the songs.
*...One song per audio cassette. That's not accurate, but maybe the other songs on that cassette are still widely distributed, with only one of them being a rare record that only exists in this form.