That’s a good memory for you, O. I’m guessing you have 10 years on me based on the music you were listening to and your description of the juke boxes. By my time I’m guessing it was all solid state in the NJ diners. They’d have these table top terminals with a big wheel on top to turn and flip a sort of Rolodex with the names of the singles. Feed it quarters and punch in a number or letter and number to get your song(s) in the que.
I know of Shadowfax. Have one of their LPs (Dreams of Children) I bought not all that long ago. Did not follow them closely. There used to be a good program on public radio out of NYC, "New Sounds". John Schaeffer was the host. See link here...
http://www.wnyc.org/people/john-schaefer/He played a range of new age, ambient and electronica on his program. That’s where I first heard Shadowfax. Also got introduced to Brian Eno, Harold Budd and Jon Hassell through that show.
If you enjoy Shadowfax, you might like The Penguin Cafe Orchestra. Here’s a sample. Pretty certain it ain’t jazz, though. Might not even be that similar to Shadowfax but the two names are linked in my head for whatever reason.
https://www.youtube.com/watch?v=NPpRJoYISSQ&ab_channel=itsfredholmestoyouFound "A Thousand Teardrops" on Tidal (included in the album "What Goes Around: The Best of Shadowfax". Playing it now.