i feel like greg has encapsulated pretty well what my own thoughts on the track. i think the association i have with ambient jazz is that it is sort of low-key and low-energy, with the occasional chord stabs conveying, well, small bursts. however i really do like some of those few sections where you have a slightly more driving and steady rhythm and accompaniment (such as around 1 minute in?)... though i also can see how if you had too much of that you might risk lowering the contrast between the "thunder" sections and the rest