Have you been to an aluminum pitch lately?
General Cable is making the rounds trying to rehabilitate aluminum again. They are still concentrating on feeder sized conductors but they do leave the door open for branch circuit sized wires sometime soon (10&12)
They blame it on device manufacturers who charge such a premium for Co/Alr
One interesting thing I heard is that if you really want to use NoAlox, you should be using it on your copper wire, not the aluminum (most lugs are aluminum) and they also say wire brushing the conductor is a waste of time.
It is an interesting show.