Micron Technology has ridden the AI hardware wave to a fivefold stock surge, but the company that made that ascent possible — Nvidia — is quietly reshaping the conditions that sustain it. By qualifying multiple memory suppliers, experimenting with cheaper alternatives, and designing chips to consume less premium memory, Nvidia is exercising the quiet leverage of a dominant customer. The deeper question is not whether Micron is thriving today, but whether the architecture of tomorrow's AI chips will still need what Micron is building.