I think fusion is where jazz lost it's definition. Before the 70's, when someone said "jazz", you knew what they were talking about, but after then, it could mean almost anything. Presently, the music that fits the jazz definition sounds like an imitation of the jazz of the 50's and 60's; something I'm not especially turned on by.
Pat Metheney caught my ear after the 70's; his music was new, fresh, and kind of abstract, I liked it. Whether or not it was jazz, I couldn't care less; others can argue that point. "As Falls Wichita, So Falls Wichita Falls" was probably the first album I bought, this is quite abstract; in spots it's flat and dull, like the Missouri plains but for the most part it's interesting.
https://www.youtube.com/watch?v=SwfVarzG1js
"Offramp" was another album that caught my attention. "Are You Going With Me" and "Au lait" were two of my favorite cuts on this album. I don't know what you would call the dreamy and abstract "Au Lait", but I like it.
https://www.youtube.com/watch?v=uh8bpl5KCPg
https://www.youtube.com/watch?v=5b0CHysDsjw
Enjoy the music.