Detroit Auto Show May Be Celebrating an Era About to End

Before the start of the North American International Auto Show, Alan Batey, GM’s North American president, introduces the new Chevrolet Silverado LT Trailboss in Detroit, Jan. 13, 2018. Three years of record sales for automakers mask signs that harder times lie ahead: bigger incentives, more fleet purchases and higher used-car values. (Brittany Greeson/The New York Times)