Amazon's Just Walk Out tech failed in grocery stores because 700 out of 1,000 sales needed human review. But the same idea is thriving in stadiums.

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Amazon's Just Walk Out technology failed in grocery stores due to complexity and human review requirements, but the same concept thrives in stadiums. Mashgin kiosks use edge AI and 3D computer vision to process transactions in under 15 seconds at 150+ sports venues, handling over 1.4 million items in NFL stadiums in 2024. Success factors include limited SKUs, controlled environments, high margins, and on-device processing without cloud dependency. The article examines technical patterns for high-speed transaction systems: edge processing over cloud, resilience through graceful degradation, integration rigor across POS and payment systems, and observability to catch performance degradation early.

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