Everyone over a certain age who’s obsessed with music — rock and rap, punk and funk, everything else from Afropop to Zydeco — has a favorite, go-to Robert Christgau consumer guide review. These were the tightly wound little capsules that the self-proclaimed “dean of rock criticism” started penning in a Village Voice column back in 1969, complete with letter grades; the 83-year-old writer still gins up these brief, opinionated shots across the bow every month on his Substack account. Can’t stop,