CIO 100 2025: Unlocking the Modernization Paradox 

Enterprise IT is at an inflection point. CIOs face growing pressure to unlock data, harness AI, strengthen cybersecurity, scale securely, and reduce costs, all without interrupting the mission-critical systems that keep global commerce moving. Modernization is no longer optional. However, while most executives place it at the top of their agenda, many initiatives still do not deliver the outcomes leaders expect.  

This tension, the need to modernize versus the challenge of realizing results, has become one of the defining conversations in enterprise technology. And at this year’s CIO 100 conference, Rocket Software was right at the center of it.  

Phil Buckellew, President of the Infrastructure Modernization Business Unit at Rocket Software, recently delivered a keynote titled “The Modernization Paradox” at the CIO 100 Awards and Symposium in Scottsdale, Arizona. Drawing on more than four decades in technology, Phil reframed the modernization discussion: success is not about chasing the latest trend but about evolving core systems deliberately and disruption-free.  

Hype Cycles vs. Enterprise Reality  

Every few years, a new technology wave promises to rewrite the rules. As Phil noted, leaders have all heard the same refrains: “The mainframe is dead. Big data will fix everything. Just move it all to the cloud. Rewrite everything in Java. Low code will replace developers. Blockchain is the future. AI will replace your entire team.”  

Each of these statements contains a grain of truth and a heavy dose of oversimplification. In enterprise IT, oversimplification is dangerous. CIOs do not manage proof-of-concepts; they manage systems that handle 70% of the world’s commercial transactions.  

At CIO 100, the conversation moved beyond the hype. The real question was not “what’s next?” but “how do we modernize with impact, without disrupting what works?” That is the essence of the modernization paradox.  

The Modernization Gap: Ambition vs. Outcomes  

Phil introduced what he calls the Modernization Paradox. Over 60% of executives list IT modernization as a top priority, yet about 70% of large-scale transformations do not deliver their intended outcomes. CIOs know they must modernize quickly, but the reason so many efforts fall short is apparent.  

Too often, organizations chase speed at the expense of stability, applying a “move fast and break things” mindset to environments where stability is non-negotiable. In consumer technology, breakage may be tolerable. In enterprise systems, it creates compliance risks, downtime, and loss of trust. 

At CIO 100, the message was clear: modernization is no longer about being the fastest but the smartest.  

The Rewrite Trap  

Few strategies illustrate the risk more clearly than the wholesale rewrite. While tearing everything down and starting fresh may sound appealing, the track record tells another story: 90% of rewrite projects fail the first time.

During his keynote, Phil shared an example that struck a chord: a major financial institution in the Asia-Pacific region invested nearly a billion dollars over seven years to rewrite its most critical application. Despite the scale of investment, the system never launched. Customers faced service disruptions and uncertainty, regulators intervened to ensure stability, and leadership faced serious consequences for the missteps.  

This story is not isolated. Research shows that most rewrite projects encounter significant setbacks, such as years of delays, spiraling costs, and incomplete implementations that never move into production. Many organizations attempt them multiple times with similar outcomes. The lesson for CIOs is clear: they need a strategy that balances innovation with continuity, building on what works, minimizing risk, and evolving systems strategically so modernization delivers value without disruption.

Precision Modernization: An Industry Shift  

So, what is the alternative? Increasingly, CIOs are turning to precision modernization, a strategy Rocket Software has pioneered for decades.  

Rather than tearing down stable systems, precision modernization focuses on evolving them incrementally: optimizing what needs improvement, innovating where it adds value, and preserving the parts of the business that are already performing reliably.  

At Rocket Software, this approach is not a theory. It is proven at scale:  

• 35+ years of modernization expertise  
• Partnerships with 5,000+ IBM Z organizations  
• 377,000+ applications refactored  
• Over 1 billion lines of COBOL have been modernized  
• Trillions of CICS events analyzed with zero performance impact  
• Billions of daily transactions monitored without disruption

The conversation at CIO 100 confirms Rocket Software’s proof points: precision modernization is safer and more effective.  

AI: Valuable, But Not Enough on Its Own  

AI dominated the agenda at CIO 100, but the conversation is maturing here, too. While AI can accelerate modernization, Phil emphasized that it is not a substitute for human expertise.  

No large language model has been trained on proprietary COBOL workflows, payroll cycles, or tax rules. And no CIO wants to hand over source code for their core banking platform to a third-party model. AI can be an enabler only when guided by deep domain knowledge, compliance context, and architectural expertise.  

The consensus at CIO 100 was clear: AI is part of the modernization toolkit, not the strategy.  

Modernization in Practice  

The most compelling stories from CIO 100 were not about radical disruption but smart, deliberate change.  

• A global financial institution began by modernizing smaller markets, proving outcomes, earning regulator confidence, and scaling up.  
• A national railway modernized interfaces and introduced automation, while keeping its mission-critical core stable.  

These case studies reinforced a key message: modernization is essential—but it doesn’t require disruption. Phil’s challenge to the audience was clear: the real risk isn’t the presence of long-standing systems, it’s the outdated belief that the only path forward is to replace them outright. Too often, organizations chase rewrites or radical overhauls that introduce more risk than value.  

The smarter path is to modernize with precision: building on trusted systems, unlocking new value, and evolving deliberately and strategically—Modernization. Without Disruption.

Looking Ahead

CIO 100 sets the modernization agenda. This year, Phil Buckellew challenged leaders to rethink modernization not as a disruptive rewrite but as a pragmatic, disruption-free evolution of their most critical systems.  

For CIOs, the opportunity is clear: modernization does not mean starting over. It means building smarter, respecting what already works, and modernizing where matters most.  

At Rocket Software, we have helped enterprises across industries modernize this way. And as the modernization conversation continues to evolve, Rocket Software is shaping the path forward.