IBM outlines plan to simplify mainframe overhauls

IBM’s new Z Atlas tool is designed to use AI agents and skills to map mainframe environments, automate infrastructure and application changes, and produce traceable evidence for validation, compliance, and audit. For CIOs, this signals that mainframe modernization is increasingly being positioned as an AI-assisted optimization effort rather than an all-or-nothing platform exit, which could lower risk and cost while helping IT teams preserve critical workloads and accelerate change delivery. At the same time, it reinforces the need to validate vendor claims carefully, since modernization programs are still prone to delays and failure when teams overestimate what AI can safely automate.