Sure the physics hasn't changed but there is a huge difference between 1970 and now in how both ICEs and electric motors are constructed. Modern chemical scien

Sure the physics hasn't changed but there is a huge difference between 1970 and now in how both ICEs and electric motors are constructed. Modern chemical science and engineering processes have made a huge increase in our ability to get more results within given constraints. Go crack open an ancient power tool or appliance if you don't believe me.