This document summarizes the findings of a study analyzing the impact of end-use flexibility on the Norwegian energy system. The study used an optimization model to evaluate two scenarios: Energy Nation with decentralized solutions and Nature Nation with centralized solutions. The study found that end-use flexibility from electric vehicle charging, hot water tanks, and batteries can reduce energy system costs by 8-5 billion euro annually by 2050 while lowering peak demand. However, it also reduces income for power producers by 0.5-1 billion euro. End-use flexibility shifts electricity use to times of high solar production and low prices, benefiting buildings and international electricity trade while negatively impacting power producers.