Fleetwood Mac rolled into Buffalo Memorial Auditorium on the Tusk Tour — supporting the sprawling, experimental double album that represented Lindsey Buckingham’s deliberate attempt to escape the commercial perfection of Rumours. The band was the biggest act in the world at this point, and their live show was both a pop music spectacle and a complicated soap opera playing out on stage. Buffalo got a band at the peak of their powers and the height of their dysfunction — which made for unforgettable rock and roll.