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Do the others ones not consume power when you don’t need to change the display, are legible in daylight, or otherwise not emit light?

These are unique advantages to e-ink as far as I’m aware.

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It doesn't matter for a stationary screen

It certainly does depending on your application. Grocery stores use them for prices where you wouldn't want a glow and low power means you can run off a battery. If I integrated into my walls as a smart device I would want a subtle design without a glow. These are just two examples off the top of my head. The application matters.

Also where did this stationary context come from?

People are asking about using it as a monitor in the comments. Grocery stores can do wireless power but the comments are complaining about them being too big or small.

You can easily have a non backlit black and white display, like the one on an f91w or LCD clock.

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