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I have a startup idea: I will make the robot that ferries your laundry robot up and down the stairs.

You could call it the El-e-vator!

Not a bad idea, just a cog track that the robot grabs onto. I'd install one.

I have a stairlift to sell you.

A coming update will enable grappling hook operation

Not even stairs, looks like one step will defeat this $8000 robot.