
Legacy System Modernization: Strategies, Roadmap, and Real Costs
TL;DR Legacy system modernization is the structured process of upgrading outdated applications, databases, and infrastructure using one of seven strategies (rehost, replatform, refactor, rearchitect, rebuild, replace, or retire), chosen through a phased, risk-managed roadmap rather than a single big-bang rewrite. Key Takeaways Legacy system modernization updates outdated applications, databases, and infrastructure using one of seven strategies: retain, retire, rehost, replatform,

