MILAN — A year after joining Gucci, Demna finally made his runway debut for the brand. His “La Famiglia” and “Generation Gucci” collections, issued as lookbooks late last year, were explorations of the house’s archive, whereas today’s outing was billed as the designer’s full-throated vision.
The challenge he faces is huge: Restore the fashion authority of Italy’s largest luxury brand, where sales have nearly halved since their 2022 peak. And as he developed his response,…

