The seemingly endless length of this Oxford St/Madison Ave equivalent has diversified in recent years. You’re guaranteed to find everything you’ve ever wanted and then some. However, diversification does not imply physical expansion, which is why walking with one foot in the sewer is neither strange nor unfamiliar during peak human rush hours when, at any given moment, sharp-tipped brollies, hip-hugging couples, rowdy chimney sweepers and speeding bicycles all crowd onto the baguette-like width of Ilica’s sidewalk.