Even as quick commerce startups are retreating, consolidating or shutting down in many parts of the world, the model is showing encouraging signs in India. Consumers in urban cities are embracing the convenience of having groceries delivered to their doorstep in just 10 minutes. The companies making those deliveries — Blinkit, Zepto and Swiggy’s Instamart — are already charting a path to profitability. Analysts are intrigued by the potential of 10-minute deliveries to disrupt e-commerce. Goldman...