Kioxia and Sandisk: Why NAND Is the Worse HalfThin moat

The moat pages describe NAND as the tougher, more crowded business. The competitor list explains why: alongside Samsung and SK hynix, Micron faces Kioxia and Sandisk in flash¹, where the participant count has historically been higher and the discipline correspondingly weaker.

The arithmetic of oligopoly is unforgiving about numbers. In DRAM, three producers control the great majority of supply, and each knows that adding capacity aggressively will hurt its own economics as much as anyone else's — which is the entire basis for the rational-competition argument the moat rests on. Add two or three more participants and that calculus weakens: someone is always willing to buy share, and the price discipline that makes memory investable disappears.

This is why Micron's two product lines behave so differently through a cycle and why the DRAM business, not the company, is what the moat pages actually defend. NAND consolidation has been the industry's persistent hope and has moved slowly.

Watch NAND industry consolidation. Every reduction in the participant count improves the structure permanently, and it is the only thing that would make this half of Micron resemble the other half. Absent that, NAND is a business that earns its cost of capital across a cycle at best.