If I'm supposed to buy a robot to clean my house, I personally don't want to have to go looking for where the stupid thing has put my cups and plates or whatever whenever it straightens up. I expect there to be a place for all the things and all the things to be put back in place. That's not "er mah gerd the world is ending because millennials am I right!"; that's "your idiot robot can't do the one job I bought it for".