One actual problem I had with a most basic Roomba(6xx) was it was banging a shelf in the room at exact same angle each run every day, which eventually toppled a thing on it and splayed water all around.

I felt like writing a automobile recall notice that says “inappropriate X leading to Y after Z repeats” of which X seems pretty benign item like a wire sheath was just one step too thin or a strap was too tight by a notch.

Damn those things are consistent and it’s extraordinary how powerful consistency is...