I heard "Power to the People" on AFN Radio when it was released, but never saw a copy in a local shop at the time. Bellaphon started distributing Milestone along with the other Fantasy group labels, but not from the label's start, and the earlier titles were rare over here. (I remember Milestone was distributed by Audiofidelity before Fantasy took over.)
I must admit I found the funky or otherwise experimental LPs like Canyon Lady, Multiple, The Elements, Black Miracle, more interesting than the neo-bop stuff he did live. That was what I was into at the time. I still like them.