I don't much like 'jazz', but I do like Miles Davis's early 70's stuff, as it doesn't sound to me like 'jazz' and it's really interesting music to me. Much of it reminds me of Grateful Dead space jams (and I've seen Branford Marsalis and Ornette Coleman jam with the GD a few times in Oakland). I got that Vinyl Me Please box set of 'Miles Davis - The Electric Years', and that is perfect for me. Herbie Hancock's 'Crossings' is like that too; doesn't sound like 'jazz', just 'music'.
I am gathering that the reason why you are saying you don't consider early 70's Miles and "Crossings" jazz, is because they don't sound like all those 50's post bop jazz recordings, that seem to have become the mainstream music listener's entire idea of what jazz sounds like.
Jazz is not a "style" of music that has a certain sound. It is a way of thinking about music, using sophisticated musical vocabulary, spontaneous composition ability, amazing levels of musicianship, musical communication with musicians while playing, etc.
Make no mistake, those early 70's Miles recordings and "Crossings", are most definitely jazz. The musicians are all using jazz techniques, the vocabulary of jazz, jazz improv, etc.
There are subgenres of jazz, that sound even less like the jazz most people think of when they think of the "way jazz sounds", than those 70's Miles recordings or Crossings.
Chamber-jazz, M-Base, avant-garde, fusion, jazz noir, just to name a few.