OK...so I'm stoned and you have to deal with my rambling diatribe. Big life long Joni Mitchell fan. Scan forward a few decades and I have a musician friend in Minneapolis...I grew for him and his buddies. He was a sax player but was totally enchanted by Jaco Pastprious...a name I was unfamiliar with.
I researched this and discovered that Jaco was instrumental in developing Joni's "new" jazz based sound she introduced in Hejira.
So now I am going back and listening to all the Joni songs that contain Jaco bass lines...in order to fully appreciate Jaco's role in Joni's music...which was powerful.