This guide explains that while mainframes are stable and powerful, delaying modernization leads to rising long-term costs, talent shortages, security risks, downtime, and lost innovation. Pages 2–4 show how aging hardware, scarce skills, outdated security, and integration barriers drive up maintenance expenses and hinder agility. Pages 5–7 outline modernization paths including infrastructure updates, automation, DevOps, APIs, application evolution, and cloud-connected mainframes. Page 8 highlights benefits such as higher uptime, faster delivery, stronger security, and better talent retention. The guide urges iterative modernization to reduce risk and unlock long-term value.

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