Under pressure to reduce greenhouse gas emissions, the global passenger car market is currently experiencing a shift from vehicles powered by internal combustion engines towards hybrid and fully electric models. Through an analysis of registered light-duty vehicles in Quebec, Canada, from 2011 to 2021, this study forecasts the evolving fleet's electricity demand under various electrification scenarios. The data indicates a yearly average fleet growth of 67,276 vehicles and an annual mass increase of 11 kg per vehicle from 2011 to 2021. Based on these trends, our projections estimate an electricity demand of 7.68 TWh in 2030, 17.84 TWh in 2035, and 29.03 TWh if the fleet continues evolving similarly. However, stabilizing the electric vehicle mass at the 2021 level reduces electricity demand by 17.6% in 2040 at a cost of a fleet that's 25.9% lighter.