The resurgence of nuclear—especially SMRs and MMRs—is becoming a proving ground for “fleet-first” digital strategies that will quickly spill into non-nuclear generation. Because these programs are being designed around modern data governance and BIM/ISO 19650 practices, they are raising the bar for how engineering, operations, and maintenance information is standardized, governed, and delivered across the CapEx-to-OpEx lifecycle—and prompting many asset owners to assess how existing operating plants in the fleet, whether nuclear, fossil, or renewables, can be converted from legacy data structures (e.g., KKS/RDS PP and document-centric repositories) into updated BIM-aligned information models. This presentation explains why that conversion is foundational to realizing digital twin value—reducing handover effort, strengthening management of change, improving reliability and availability, and making traditionally stranded information usable in day-to-day troubleshooting. It then illustrates a practical future-state operator/engineer experience: role-based, contextual views that unify alarms, health indicators, performance analytics, maintenance history, documentation, and GenAI decision support—so teams can move faster from detection to diagnosis to prioritized action.