Today I was reminded that dumb IoT light UIs have a decades-old predecessor. (Okay, two predecessors: there's also the clapper.)

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An example of failure of this principle is the buttons on the arm of the seat in an aeroplane. The man that put the buttons in place obviously never rode in an aeroplane. How may the passenger turn his light on or off? The passenger may by good luck and dogged perseverance, trying this button ton and that, discover the secret. Why should it be a puzzle to turn a light on or off?
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– W. Edwards Deming