Longtime shareholders in Micron Technology ( MU ) used to be longtime sufferers. Not anymore. The company for decades plodded along in the volatile, low-margin business of making computer memory chips. That's a tough racket. Chips are a commodity. They're cyclical. Meanwhile, chipmakers have to constantly plow cash into research and development — to say nothing of capital expenditures — just to keep pace with peers. Micron escaped its formerly poky past thanks to the era of artificial intelligence (AI). The ongoing build-out of AI infrastructure isn't just creating massive demand for specialized chips from the likes of Nvidia ( NVDA ); it's also fueling a run on companies that supply storage. Demand for Micron's wares — Dynamic Random-Access Memory (DRAM), NAND Flash memory, Solid-State Drives (SSDs) and Ultra High Bandwidth Memory (HBM) – has absolutely exploded. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor.…