That's something I'd actually pay good money for - a streaming music service with a library as extensive as the major contenders (or better yet let me bring my

That's something I'd actually pay good money for - a streaming music service with a library as extensive as the major contenders (or better yet let me bring my own!), which learns my preferences not in isolation, but tracking how they affect each other and environment - this song is normally followed by that song, or this song usually gets skipped if playing while driving etc.