Why 70% of Legacy Modernization Fails - And How the Strangler Fig Pattern Changes the Odds

European enterprises will spend €25 billion on legacy modernization this year alone (Gartner Report 2025)-statistics. Yet the uncomfortable truth remains: 70% of these projects will fail. Not because of inadequate budgets. Not because of inferior technology.

They fail because most organizations follow the traditional path-hope for the best, plan for overruns, and brace for user revolt. The 30% that succeed have something different. They have a fundamentally different approach.