I’ve lived in several barely finished neighbourhoods and all were walkable: Hammarby Sjöstad in Stokholm, Jätkassari in Helsinki, the new Ancoats in Manchester…
All smelled of fresh paint and wet concrete. All were built with the intent to be walkable, and all are wonderful places to live. I never felt the need for a car once. What matters is not the age but the intent of the designers.