infinite wisdom on finite music

I spent most of this past Thursday poking around on the internet and trying to find new music, but the search process got me to thinking: How much unique music is left to discover? It seems like a stupid question, but possibilities may be running out. Avril Lavigne, for example, was recently sued by rock band Rubinoos for what they claimed were musical and lyrical similarities between her song, "Girlfriend," and their 1979 song, "I Wanna be Your Boyfriend." She had no prior knowledge of the band or their song, it was mere coincidence. But that got my wheels turning...see if you follow me here:

There are 12 major musical keys, 7 natural tonics (A-G) and 5 accidental tonics (A#,C#,D#,F#,G#). Yes, I know you can double-sharp and double-flat, but I'm speaking aurally (to be oxymoronic). There are also 12 minor keys, which are comprised of the same 12 possible notes but sound different enough thanks to scale intervals that I'll count them independently.

There are 7 notes in each key that form the basis of its chords, and 2 chord possibilites (triad or seventh). I know there are things like secondary dominants that add a bit of diversity, but most bands heard on the radio (with the exception of The Killers) don't really use them. As a matter of fact, most pop bands stick to the major chords of the key...a mere 3 choices!

There are 2 different types of meter. And while you can spice things up by writing in 5/8 or something instead of 6/8, most music is heard as either simple or compound meter.

Now think of allll the albums that came out in the US on Tuesday, both from the bands people have heard of and those yet to emerge. Those songs are copyrighted whether people listen to them or not. What about last Tuesday? The Tuesday before that? How about the last 50 years? How about the other 195ish countries putting out music as well?

In conclusion: We're going to run out of new music sometime. I guess then it'll be mash-up artists like Pretty Lights satisfying our musical needs. In the meantime though, there's still new music to be made, found and heard.