I could see this setup working for someone who is running robotics like Snooze but I feel it would get in the way for someone who is going to work from both the back and the front of the machine hand guiding, it is especially evident in Snoozes picture. Can you imagine trying to work from the back and having all those cords hanging down and in the way?? All of my power cords are wire tied right to my frame and on on a surge protector with enough slack that the machine can move freely in all directions the entire length of both back rails and front to back rails. But even with surge protector my dealer was very adamant that I unplug the machine when not in use so (due to electrical storms) that would be another reason I would want the plugs more accessible. But if you are in an area that never gets thunder storms that would not be a consideration.
As for me I would rather have the cords on the ground than hanging down where the machine or you could get all tangled up in them.