Apple Music seems to be the only service that handles uploaded music and syncing well, integrating uploads seamlessly into your library. I think it has an edge

Apple Music seems to be the only service that handles uploaded music and syncing well, integrating uploads seamlessly into your library. I think it has an edge with anyone who downloads albums that are too obscure to get licensed to the streaming service or unofficial releases. It probably partly accounts for the popularity of Apple Music with younger hip hop heads who need to integrate mixtapes in their libraries.