Apple has detailed how its life after iTunes will work for users following its demise in macOS Catalina later this year. The Cupertino giant has released a support page on its website addressing a few key concerns right up front including what will happen to purchases, playlists and syncing functions.
https://www.notebookcheck.net/Apple-details-how-iTunes-axing-will-work-in-practise.423125.0.html