Originally Posted by
PAXboy
Indeed, they only need to see who or what is out there - in an evacuation, is there fire/water/danger?
Also, the main doors have much space taken up with the slides and a big window gives no benefit.
I'm really only guessing but you might be onto something with that last comment- in addition to the slide you've got to fit into the interior of the door structure all the moving cams/rollers/levers associated with locking/unlocking, plus maybe power assist...there might not be much room left to give a clear run through the internal structure that is big enough for a standard window.