I'm now old enough to personally identify every object in antique stores.

The line uses self-deprecating humor to mark a threshold of aging: the speaker has lived long enough that “antiques” are no longer mysterious relics but familiar items from their own lifetime. It plays on the shifting boundary between the everyday and the collectible—how objects migrate from common use to curated nostalgia as generations change. The joke also hints at the intimacy of material culture: recognizing an object is a kind of personal history, proof of having inhabited earlier technologies, fashions, and domestic routines. Beneath the wit is a mild sting—time has passed, and the speaker’s memories now overlap with what the market labels “old.”