Most replatforming initiatives fail not because of technology, but because organizations confuse platform migration with business transformation. After two decades working with enterprises across financial services, manufacturing, and public sector organizations, we have seen this pattern repeat: leadership approves a "lift and shift" expecting minimal disruption, technical teams discover the platform differences mid-migration, scope expands uncontrollably, timelines double, and the organization ends up in parallel-run purgatory, paying for two infrastructures while achieving the benefits of neither.