To be fair, the screenshots do not do it justice. The default theme is a lot more slick than the horrible blue themes in the screen shots.
You also have to bare in mind that Subsonic also has native players for a whole bucket load of platforms (both mobile and desktop), supports video, transcodes, is multi user and has a tone of other neat functions.
I'd say that was more "narrow minded prejudice" to dismiss an application you've not researched nor ran simply because of a tired old myth about an enterprise level language which is in wide scale production use on devices ranging from 'dumb' feature phones through to enterprise servers.
You also have to bare in mind that Subsonic also has native players for a whole bucket load of platforms (both mobile and desktop), supports video, transcodes, is multi user and has a tone of other neat functions.
In many ways, Subsonic is more akin to Spotify.