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Does it benefit from having four legs, other than to make it look unnervingly doglike? It seems like a robot spider might be more efficient, if not also more terrifying.

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I can envision better uses for robot spiders if we want to disincentivize littering.

Hell, I'm willing to contribute to the open source repo

Or wheels.

Needs to go up stairs.

yes because beaches are famous for its stairs.

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