Lately, Jason Isbell has been in the news plenty and quite vocal on Twitter about being back on the road and the vaccination policies he’s implemented for his shows. He’s stuck to it, cancelling a couple performances in places that wouldn’t enforce vaccination rules. But as for the rest of the shows, it marks fans’ first opportunity to hear the 400 Unit rip through material from last year’s excellent Reunions. And the last few nights, concertgoers got something particularly special out of Isbell and his band.