Museums shuttered, Broadway gone dark, orchestras furloughed—now that nothing remotely cultural is going on about town, The New Yorker’s “Goings On” section seems like a relic of a distant past. In fact, it already was one. A feature that has run continuously since the magazine’s first issue, “Goings On” was last updated in 2016, when editor David Remnick announced a parade of new online features: a revolving display of articles,...