Come to that, weren't all the robots designed at about the same time? I realize the WALL-E units didn't have to be all that classy-looking, but how come WALL-E doesn't have Eve's super power source? He's on solar panels.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"