I saw a interview in 2016 with Graham Nash. He stated then he would never perform with David Crosby again. He sounded REALLY pissed off at him. As a side note, Graham also stated he had been unhappy in his marriage for many years before he was divorced. He stated with the deaths of Glenn and David B. he realized life was short and he had to do what made him happy. I think he had been dating the new wife for a year or two at the time of the interview.