I use Itunes for playlists and general organisation. Been doing so for years and as Denon Prime/Traktor have playlist syncing , all good. A few glitches though. I use the Genre in Itunes to classify, adding my own crazy narratives, but if I update these post import into DDJ/Traktor the comments do not update. Plus you need to ensure you keep your HQ files on your main computer you use for DJing or SD exporting. Itunes match will sync accross all your devices, but if you have the actual HQ file on another computer Itunes will only let you download a 256 kps version.
Smart playlists in Itunes are also good, filter by Genre/Star Rating/ file type and quality etc etc
Will give Ableton Live Lite 11 a go then…….wormhole here I come !