Ascendant country-rock superstar Zach Bryan will be on his massive Quittin Time tour for most of this year, and it represents one more step in a truly meteoric rise. Given how unknown Bryan was just a couple of years ago, it’s been striking to see this guy move to playing ramshackle singalongs about flawed people in arenas and stadiums. It seems positively Springsteenian. Last night, Bryan made the connection real, bringing Bruce Springsteen onstage at his Brooklyn show.