Everyone seems to be overthinking this. They will simply split out the apps and probably either have a "SYNC" button in each app for devices or a new SYNC app for the peasants who still choose to sync their device using a cord or for the 10 people that still use an old iPod.
Or they could to the nuclear option and completely kill all iPod support and wired syncing support.
But realistically they will probably have a sync app for older devices.
Or they could to the nuclear option and completely kill all iPod support and wired syncing support.
But realistically they will probably have a sync app for older devices.