What Is a Legacy Platform Rebuild? 5 Revenue Signals

Metric Value Annual maintenance cost for legacy code $3.61/line IT leaders blocked by legacy systems 72% Typical rebuild cost range $250K-2.5M A legacy platform rebuild means ripping out the foundation and starting fresh. You're not tweaking React components or cleaning up database queries. You're migrating from that 2008 Ruby on Rails monolith to a modern TypeScript stack, switching from MySQL to PostgreSQL, moving from EC2 instances to containerized deployments. The business logic stays. your pricing algorithms, workflow rules, and domain models. but everything underneath gets replaced. According to Gartner, 90% of current applications will still be running in 2025, yet most companies are drastically underinvesting in modernization. That's a ticking time bomb. Refactoring is housekeeping. You fix naming conventions, extract methods, maybe split a 5,000-line file into manageable modules. The architecture stays intact. A rebuild? That's demolition and reconstruction. When we rebuilt VR