Because I teach a music business class at Humber College, and also because I make much more of my income from actually playing the guitar, composing, recording, and touring, I'm always grateful for good articles/blogs on the state of the music business.  Here's one my friend Elizabeth Shepherd shared with me:
 

https://medium.com/cuepoint/the-devaluation-of-music-it-s-worse-than-you-think-f4cf5f26a888#.g9ia7yaya