Everyone’s obsessing over FLOPs. Benchmarks, leaderboards, token throughput. But here’s the dirty secret nobody in AI infrastructure wants to admit: the memory wall is the real bottleneck, and we’ve been pretending it doesn’t exist. While GPU suppliers print money selling GPUs with ever-fatter HBM stacks, a quiet revolution is happening in how we think about memory hierarchy—and it’s about to reshape the entire inference stack.