In context:
Far from being a steady march to greatness, the past and present of robotics and AI are littered with examples of banal practicalities tying machines down. If you want to look at what the future of AI really holds, it’s not the highlight reels that matter – it’s the out-takes.
... don’t even talk about stairs. Judging by the awkward ascents of most robots, to avoid the rise of the machines we only need to retreat to the mezzanine.