My answer may not quite fit the topic. But I’ll share anyway.
In the late 20-teens, ZZ Top and John Fogerty we’re touring together. My wife and I saw them on the Jersey Shore (thanks VetTix!) and Fogerty opened the show and absolutely killed it. Then ZZ Top played and Billy Gibbons just didn’t have it anymore. We left early.
Several weeks later they played Jones Beach Amphitheatre and thanks to VetTix we got to go again. Once again Fogerty knocked it out of the park and Billy was just not up to snuff.
It was sad.
Interestingly, Billy Gibbons is featured on one of the tracks of Slash’s new album Orgy of the Damned. That track is the perfect fit for Gibbons and it holds together beautifully.