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IT modernization remains a make-or-break CIO responsibility, but it is not a mandate to replace every old system. The better test is whether each application still supports the business at an acceptable cost and risk—and whether a specific change will improve that fit without creating a project the organization cannot deliver.
What IT modernization means for CIOs in 2026
Modernization is ongoing portfolio management: deciding which systems to retain, optimize, extend, consolidate, replace, or retire as business needs change. Age is a signal to assess a system, not a verdict on its usefulness. A mature application may still provide the needed functionality, while a newer tool may duplicate capabilities or add complexity.
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The aim is to simplify the technology estate while preserving operational continuity and making room for future requirements, including new data and AI use cases. That calls for business signals—not “spring cleaning”—to determine which applications are slowing work, creating risk, or consuming resources without enough value.
As Amar Aswatha, senior vice president for global business engineering at CGI, puts it: “CIOs have to watch for business signals on when and what to modernize and rationalize. It’s not about spring cleaning, it’s about what apps are slowing the business down.”
Are legacy systems still important for enterprise IT?
Yes. Legacy systems can remain important when they still perform essential work, and modernization does not always mean replacing them outright. In Ensono’s provider-sponsored June 2026 survey, 78% of 500 IT decision-makers and line-of-business leaders at large U.S. and U.K. organizations said legacy systems were more important than two years earlier. In that same survey, 52% said their organizations optimize and extend legacy systems rather than replace them outright. The results describe the survey respondents, not all enterprises.
Rachelle Putnam, vice president and CIO of General Dynamics Land Systems, captures the distinction between age and business fit: “Some might say we’re not on a modern tool set, but that doesn’t mean we don’t have the functionality we need.” Keeping a system can be rational when its function remains necessary and its risks, costs, and dependencies are understood. It is not a reason to ignore unsupported technology or known vulnerabilities.
How to decide what to modernize, rationalize, or retain
Assess applications as a portfolio, not as isolated technology projects. For each system, compare its business contribution and operational role with the cost and risk of keeping it, changing it, or removing it. A practical assessment covers:
- Business value and fit: Does the application meet current needs? Will it support expected changes in products, services, workflows, or customer expectations?
- Cost and budget exposure: What does it cost to operate and maintain, and what would modernization cost? Could a change release resources for higher-priority work?
- Security and support: Are the hardware, software, and vendor support still available? Are there known vulnerabilities or security requirements the system cannot meet?
- Complexity and duplication: What systems and processes depend on it? Does another application already provide the same capability?
- Resilience and continuity: How much downtime can the business tolerate? What fallback, recovery, or transition arrangements are needed?
- Deployment and constraints: Does the application belong in the cloud, on premises, or in a hybrid arrangement, considering regulation and mission requirements?
- Skills and execution: Can internal teams and available partners implement and support the chosen option?
- Future integration: Can the system work with the organization’s data, integration, and AI plans?
The resulting choice may be to retain a system as-is for now, optimize or extend it, consolidate overlapping tools, replace it, or retire it. For example, rationalizing duplicate computer-aided design or reporting products may reduce complexity in a particular organization; it is not a universal instruction to consolidate every similar tool. A “cloud-smart” approach likewise means choosing cloud where it fits and on-premises where that is better or required—not treating cloud migration as the definition of modernization.
What modernization challenges in 2026 tell CIOs
Execution is a central risk, not an afterthought. Ensono’s provider-sponsored June 2026 survey of 500 IT decision-makers and line-of-business leaders at large organizations in the United States and United Kingdom found that 71% said their organizations had exceeded modernization budgets in the preceding 24 months. In the same survey, 61% said initiatives had been paused, scaled back, or abandoned. These reported outcomes argue for tighter scope, realistic budgets, and explicit plans before projects begin; they are not a universal enterprise failure rate.
Skills capacity also affects delivery. In Ensono’s separate 2025 provider-sponsored survey, 95% of 500 full-time IT decision-makers at U.S. and U.K. organizations with annual revenue of at least $500 million reported using third-party partners to close talent gaps. That finding indicates partner use among those respondents; it does not establish that outsourcing is the right answer for every CIO. Leaders should identify the skills needed for both implementation and ongoing support, then decide what can be supplied internally and where outside expertise is appropriate.
AI is changing the modernization conversation, but it does not eliminate the need for portfolio discipline. In Ensono’s June 2026 survey, 54% of respondents said AI had accelerated modernization, compared with 39% in its 2025 survey. Sumit Johar, CIO of BlackLine, described the shift this way: “The definition of modernization has literally switched in the last two to three years,” noting the opportunity to rethink SaaS systems “with AI and for AI.” The survey result is respondents’ reported experience, not evidence that AI makes any particular modernization project necessary or successful.
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What the federal legacy-system evidence shows—and does not show
The U.S. Government Accountability Office’s July 2025 review illustrates why technology risk and planning need to be assessed together. Among 11 selected high-priority federal legacy systems, GAO found that eight used outdated programming languages, four had unsupported hardware or software, and seven had known cybersecurity vulnerabilities. Those figures concern the selected federal systems GAO reviewed; they are not a prevalence estimate for private companies or government systems as a whole.
Planning quality was also uneven: only three of the 11 systems had modernization plans that included all three elements GAO assessed—milestones, a description of the work, and details on how the legacy system would be disposed of. Six plans were partial and two systems had no plans. GAO warned that until agencies fully document plans for critical legacy systems, modernization efforts face increased likelihood of cost overruns, schedule delays, and overall project failure.
GAO also reported agency-provided status information for 65 legacy modernizations on its 2019 list: by February 2025, 28 were reported complete, 34 in progress, and three not begun. These figures describe the agencies’ reported status of that specific set of federal projects, not a general modernization completion rate.
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A portfolio assessment only helps if it becomes a plan people can deliver. For each selected initiative, document:
Best Value
- book
- A Guide to the Project Management Body of Knowledge (PMBOK Guide) – Seventh Edition and The Standard for Project Management (ENGLISH)
- The business outcome and why action is needed now.
- The selected path—retain, optimize, extend, consolidate, replace, or retire—and the alternatives considered.
- Scope, dependencies, milestones, accountable owners, and the resources and skills required.
- Budget assumptions, operational and security risks, and how service continuity will be protected during transition.
- How the legacy system will be treated after the change, including data, integrations, support, and eventual disposition where applicable.
- Measures of success tied to business performance, cost, resilience, or risk—not simply completion of a technical migration.
Modernization is make-or-break because poor choices can lock in cost and risk, while unplanned change can disrupt essential work. The CIO’s task is to connect each technology decision to business need, make the trade-offs visible, and scope the work so the organization can finish it.
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