I'll be strait forward & to the point.
- it is raising the cost of the bodies
- it is unused by many
Power windows.
Remember the old crank windows?
Once electric became standard then cost of manual cranks started to increase.
Eventually the cost of providing manual exceeded the cost of electric on the assembly line.
4 a time the manufacturers continued to offer manual at a savings to consumers while in reality quietly taking a loss.

Why?
In order to keep the perception of high value electric as being a premium option consumer pay more because "hey look at this added value your receiving".

Eventually even jeeps and pick up trucks came with power windows as standard equipment.
That doesn't stop the manufacturer from implying that it is an added benefit even today.

So let us say the top speed has gone up a bit, the transmission is a hair better, power steering is now up to the industry standard and the engine has about 4% more torque.
So should we run out and buy the vehicle based on it having power windows, improved cruise control and 5 percent more foot room now?

Should we be focused on those power windows and thus be willing to pay a premium?
I wanna be clear
I am the only 1 that is right 
Sorry.
