Many companies still run critical systems on Java 8 in 2026. Not because they “love old technology” — but because these systems still handle real business processes every day: internal tools ERP integrations warehouse systems finance workflows customer portals The problem is usually not that the software is old. The problem is that over the years the codebase became harder to maintain, deploy and extend. Recently I started building a public showcase project focused on legacy modernization strategies instead of full rewrites. Typical Legacy Problems The original structure intentionally simulates issues often found in older enterprise applications: tightly coupled services large controller classes business logic mixed everywhere duplicated code outdated dependencies manual deployments missing API structure weak separation of concerns Example: Java public class CustomerController { public void updateCustomer(Customer customer) { Database db = new Database(); db.connect(); if(customer != null) {…