Formal methods does not arrive with fanfare. It spreads quietly, not as a revolution, but as a patch: reviewed, merged, and dismissed. In the coming decades, the dream of top-down correctness collapses under the weight of real-world software, replaced by a slower, messier reality as FM becomes infrastructure. Verified C libraries thread their way into the systems that run the internet. Model checkers embed themselves in CI pipelines. Modern type systems reach the masses. But AI and IO remain stubbornly unverifiable and insecure, forcing industry to work towards a deeper form of trust. Meanwhile, a generation of developers learns to write specifications not as a niche academic exercise, but as a matter of professional survival. This paper tells the story of how formal verification goes from lofty fantasy to invisible standard, and how, without anyone noticing, the proof goes on.