In a brutal reality check for enterprise IT departments, global research firm Gartner has published a damning report predicting that over 70% of "Mainframe Exit" projects initiated in 2026 will end in total failure. The culprit? A massive, catastrophic overestimation of what Generative AI can actually accomplish when dealing with legacy code.
For decades, the world's largest banks, airlines, and insurance companies have run their mission-critical operations on IBM mainframes coded in COBOL—a programming language so old that the engineers who wrote it are largely retired.
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