Environmental & Health: They emit zero tailpipe pollutants and generally have a lower carbon footprint over their lifecycle—even when charged with fossil fuel electricity 
Cost Efficiency: Electricity is cheaper per mile than gas, especially with metrics like MPGe exceeding 130 and energy use between 25–40 kWh per 100 miles 
Lower Maintenance: Fewer moving parts means fewer oil changes, spark plugs, and smog checks