Rooster, just curious--did you restrict it to all-acoustic because that's your preference? Generally mine, too, but such a restriction shuts out a lot of jazz that did sell well during the 1970s--Weather Report, for example, or even (dare I say it) Mangione.
Off-topic, but I'm also intrigued by what the contemporary reaction to Miles' 1970s work was. The prevailing narrative of the past few years seems to be, "This material was greeted ambivalently/negatively etc. and only now have we wise moderns come to realize how good it was." Haven't done any research, but I find myself a bit skeptical of that formulation.