I confess to, when first reading the Ornette Coleman comment, rolling my eyeballs and dismissing it as an attempt by an aging rocker to capitalize on the cache of jazz; avant garde jazz, nonetheless. Don't get me wrong, I have always been a fan of Cream and its three members individually, but I never really learned much about Jack Bruce's musical background and my listening preferences took me in a very different direction a long time ago. I came across this documentary that some of you may find interesting and taught me quite a bit about what a talent Jack Bruce was. Unlike a lot of other aging rockers he was playing and possibly singing better than ever (!) up to the time of his passing. The documentary explained for me the Ornette Coleman comment and pointed out that the animus among the members of Cream was between he and Ginger Baker; not Clapton.
https://m.youtube.com/watch?v=w3KBEq95N5U
https://m.youtube.com/watch?v=w3KBEq95N5U