Steve is concerned that replacing iTunes with a series of apps in macOS Catalina will cause Windows Users to not be able to sync. Leo says that while Apple will be shutting down iTunes downloads, he doesn't really see them coming out and stopping sync within iTunes for Windows users. In the mac, Sync is now done with macOS through the Finder. So there will likely be a similar solution for Windows users. But the trend now is that people are streaming now. Download & sync is being used less and less. But if it does, Leo recommends DoubleTwist.