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How AI is transforming tech debt management

Every enterprise operates with some degree of tech debt. With millions of lines of legacy code powering critical operations, tech debt is inevitable—eventually, all code becomes outdated. While tech debt isn’t inherently “bad,” it can limit an enterprise’s ability to adapt, innovate, and remain competitive.Addressing tech debt isn’t just about identifying issues; it’s about managing them across an enterprise modernization initiative with orchestration, insight, and accountability. That’s where platforms like MLP (Modernization Lifecycle Platform) become essential.

AI-powered modernization solutions offer advanced capabilities to enhance the assessment and management of tech debt, such as:

Automated code analysis

AI-powered tools can automatically analyze codebases to detect code smells, architectural issues, and other indicators of tech debt. For example, CodeScene uses machine learning algorithms to identify patterns in version control data, highlighting hotspots, i.e., code areas frequently modified and may require attention. This behavioral code analysis helps prioritize tech debt mitigation efforts.

Predictive maintenance

AI can predict which parts of the code will likely cause future issues by analyzing historical data and code evolution patterns. This foresight enables teams to proactively address potential problems before they escalate, effectively managing tech debt.

Prioritization of refactoring efforts

AI can assess the impact of tech debt on various aspects of software performance and maintainability, helping teams prioritize refactoring efforts based on factors like code complexity, defect density, and contribution to business goals. Tools like NDepend provide metrics and visualizations that assist in understanding and managing tech debt within .NET applications.

Estimation of remediation costs

AI can estimate the effort required to address specific tech debt items, enabling better planning and resource allocation. The SQALE method, for instance, offers a framework for assessing source code quality and estimating the remediation costs associated with tech debt.

Continuous monitoring and reporting

AI-driven tools can continuously monitor codebases for new tech debt instances, providing developers real-time feedback. This continuous integration ensures that tech debt is managed proactively, preventing its accumulation over time.

These AI capabilities are most effective when deployed within a unified modernization framework. MLP provides the end-to-end infrastructure to integrate AI into each phase of tech debt remediation, from initial discovery and impact assessment to automated code transformation and final validation. By embedding AI tooling into the MLP workflow, organizations can move beyond static analysis to execute modernization plans with measurable outcomes and full traceability.

Platforms like MLP make this integration actionable by supporting AI-assisted analysis and rule-based automation across diverse environments, including mainframe, midrange, and distributed systems. MLP’s ability to coordinate modernization assets, automate repetitive tasks, and generate audit trails gives enterprises a practical path to address tech debt while aligning modernization efforts with business priorities.

By integrating AI into the software development lifecycle, organizations can significantly enhance their ability to identify, assess, and manage tech debt. This will lead to more maintainable codebases, efficient development processes, and a stronger foundation for future innovation.

Retirement brain drain and legacy application risk

Finding IT professionals with the expertise to maintain business-critical legacy applications is becoming increasingly difficult. As experienced programmers in legacy languages retire, a widening skills gap emerges, leaving organizations struggling to support essential systems. Industries such as banking, insurance, and government, which have long depended on in-house mainframe or client/server applications, are feeling this shortage most acutely.

The loss of institutional knowledge

As Baby Boomers retire, their institutional knowledge about maintaining and troubleshooting these systems leaves with them. When a software crash, security breach, or routine feature update arises, the shrinking pool of legacy system experts poses a significant risk to IT operations and business continuity.

Younger generations of developers, including Millennials and Gen Z, were never trained on mainframe systems, do not code in legacy programming languages, and generally have little interest in learning outdated technologies. They focus on modern tech trends, leaving legacy systems further neglected.

British Airways’ IT meltdown: a recent example

A recent illustration of the challenges posed by legacy systems is British Airways’ global IT meltdown just this past December. The 95-minute outage left passengers unable to check in online and delayed flights, as pilots couldn’t process vital “load sheets,” causing aircraft to remain on the tarmac. The airline is currently investing £750 million in a three-year IT upgrade to prevent future incidents, aiming to shift its legacy data centers onto a more reliable cloud-based platform.

The skills gap extends beyond COBOL and the mainframe

While COBOL is often cited as the poster child of legacy languages, the skills shortage affects many other aging programming languages that enterprises still rely on. These include:

  • EGL
  • PowerBuilder
  • Smalltalk
  • Assembler
  • CA/Gen
  • C/C++
  • Ideal
  • Natural
  • Pascal/Delphi
  • PL/I
  • RPG

Many enterprises continue to rely on these languages, which are deeply embedded in their operations. For example, Fortran is still prevalent in scientific computing, weather forecasting, and engineering applications. Pascal and Delphi Object Pascal persist in niche commercial applications, while Smalltalk is used in some banks, insurance companies, and utilities.

Beyond the skills shortage, legacy systems introduce significant technical debt, making modernization efforts difficult. These outdated platforms hinder cloud integration, mobile app development, and the adoption of AI and Big Data solutions. Additionally, legacy code increases cybersecurity vulnerabilities, exposing businesses to potential breaches.

Addressing the skills gap

For organizations dependent on legacy systems, there are three primary approaches to mitigating the skills shortage: retaining legacy programmers, training new professionals, or modernizing technology.

1. Temporary Band-Aid: retaining and training

A short-term solution is to keep legacy programmers on board longer or incentivize younger professionals to learn legacy technologies. However, this approach requires financial incentives and comprehensive training programs. Some companies have launched apprenticeship initiatives, recruiting young IT talent and providing them with training in both legacy and modern technologies.

2. A better fix: prioritizing modernization

While training new programmers in old languages can temporarily plug the skills gap, it does not eliminate the risks associated with aging systems. Analysts widely recommend that enterprises invest in modernization. According to Gartner Distinguished VP Analyst Andy Rowsell-Jones, IT departments spend up to 75% of their budgets maintaining legacy systems. Redirecting these resources toward modernization could foster innovation and business growth.

3. The best solution: microservices extraction for rapid modernization

A full-scale modernization effort can take years, but organizations need solutions now. A highly effective approach is microservices extraction, which allows businesses to modernize critical functions without overhauling entire systems. Unlike traditional modernization, which requires rewriting or replacing an entire application, microservices extraction identifies and migrates only essential business functions, eliminating redundant code and reducing risk.

Conclusion

Organizations still relying on legacy applications built with obsolete programming languages face mounting risks. These systems limit cloud and mobile capabilities, restrict advanced analytics and AI adoption, and present security vulnerabilities. Additionally, as skilled programmers retire and younger developers avoid outdated technologies, businesses struggle to maintain mission-critical applications.

The best way forward is modernization with microservices extraction, allowing enterprises to retain essential functionality while shedding technical debt. This approach accelerates digital transformation, optimizes IT resources, and minimizes business disruption, making it the superior solution for the legacy skills crisis.