Since Davis' music was beautiful by most standards, it is beside the point that he misunderstood the term modal. While it has no impact upon the success of his musical statements that he thought of it as such, it nonetheless can be asserted that regardless of the fact that he thought of his music as modal, it doesn't make it so.

This misunderstanding of modality has had a profound effect on jazz improvisation pedagogy. The prevailing approach in modern times is to arbitrarily assign modes to each chord in a tonal progression that was designed to accompany a tonal melody. The larger problem with this approach, however, is that it fails to address the primary stuff of the composition on which one should improvise: melody, guide tone lines, root progression, and melodic rhythms. Moreover, to assign three different Greek mode names to a tonal ii7 V7 IMA7 (D Dorian, G Mixolydian, C Ionian) cadence, for example, is tedious and misleading. That progression is in the key of C Major, and if you combine the three modes, you come up with the obvious: a C Major scale; and in this context it is also less restricting to think globally through the key, rather than locally from chord to chord.

From 1958 on, Davis was searching for a way to play more motivically and to be less constricted to running chord changes while improvising. In the process, he became captivated by Ravel's various devices. While he thought that this constituted modality, he was in reality incorporating early Twentieth century Impressionist devices into jazz. Frankly, in all of my lifetime in African American music I have never heard a single modal jazz performance.