Argentines taking to the streets to revel in their Copa América triumph late Sunday inhabit a very different place now than they did 19 months ago, when their World Cup win sent millions surging into the same Buenos Aires square in a howl of collective celebration.

“Glorious,” Diego Cáceres, 38, recalled of Argentina’s massive open-air party on December 18, 2022.

“This is beautiful, too,” he said of Sunday’s crowds cheering and setting off fireworks around the capital’s…