Michael Tilson Thomas, co-conductor of Metallica ‘s S&M2 concert and live album, has died at 81. Thomas, who was the longtime director of the San Francisco Symphony, disclosed publicly in 2021 that he had been diagnosed with a rare aggressive form of brain cancer. He passed away on Wednesday, April 22nd, from complications related to the disease. Get Metallica Tickets Here S&M2 , the 2019 follow-up concert to Metallica’s 1999 S&M (which both saw the band pair itself with the San Francisco Symphony), was co-conducted by Thomas and Edwin Outwater. Thomas, largely retired by that time, returned to assist Outwater with arrangements and conducting. Metallica shared the following statement on Thomas’ passing: “It is with great sadness that we learned of the passing of legendary conductor Michael Tilson Thomas.…