My iPod 5.5g is old enough to drink alcohol in any country that has a drinking age. I bought it used, swapped the battery and the disk for an SD card mod, and it still does the one thing it was sold to do: play music. No firmware update has ever taken a feature away. No company has decided the device is too old to deserve syncing. Apple, to their credit, still ships iTunes and Music with iPod sync on macOS. But even the day they stop, the iPod will keep playing whatever is already on the disk. The original purpose has not eroded.