I disagree about music being an afterthought, Plexamp is my favourite music player and very well done as a player + the sonic analysis is a nice thing to explore.
However it feels like library scanning / metadata handling has some serious issues, and you only need to look around to see people having major, feature breaking, problems. The existence if “the plex dance” is itself a sign of issues with database handling. The issue with tracks with multiple artists is a baffling one, a sign of something broken and my issue #2 at the moment