Blog: The API-First Replatform: Why Most Modernization Projects Fail and How to Beat the Odds
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Most application modernization projects fail because teams attempt big-bang replatforming rather than incremental migration. Gartner estimates 80% of such initiatives fail to deliver expected value, with cost overruns and missed timelines being common. The Strangler Fig pattern — gradually routing traffic to new services while the legacy system remains operational — reduces risk by preserving business continuity and optionality at each step. API-first design complements this by defining stable, versioned interfaces before implementation, enabling independent team progress and consumer-driven contract testing. When evaluating vendors, the key signals are their approach to parallel operation, per-increment rollback strategies, and whether they identify architectural seams before writing code.
