That is debatable. What Miles put out during his 1969 - 1975 period is the very epitome of non-commercial music. His previous catalog was much more traditional sounding, and could be deemed way more commercially viable. Today, almost 50 years later, when you put on many of those 'fusion' records from that period, it is shocking how many tend to veer into the so-called 'soft jazz' territory. Some even resemble some non-intrusive elevator music. But not Miles. His electric stuff is still edgy, still daring, still confrontational and difficult to stomach for the uninitiated.