Cult of Mac reports:
Some sources previously stated that the [macOS 10.15 Music] app would be made using Marzipan, which lets developers easily port iPad apps to the desktop. But new information reveals that won’t be the case.
In fact,
The Mac’s next-generation Music app will be based on iTunes, not ported over from iOS.
This makes some sense. The legacy macOS iTunes has a lot of Mac-specific code, including iOS device syncing and encrypted backups. But it’s probably also just phase one in the evolution of iTunes/Music on the Mac.
Check It Out: macOS: New Details on the Music Player in 10.15
Resume playback finally implemented? What I mean is that you are listening a very long playlist of thousands of songs, quit iTunes, reboot the Mac or shut down the Mac. The next time that you open iTunes it starts from song number one again, but you want it to resume from the last song played (say, song number 1456 or whatever). For me that is the most essential feature missing in iTunes, and it was available in SoundJam MP back in 2001, from where iTunes was developed.