> and then we never heard about this invention again.
Maybe you live under a rock, but Kindle and other brands of e-ink-based readers are available and very widely used. Those are however obviously not phones, but for reading. They have a slow refresh rate and are usually a single color, rarely up to maybe 8 of them. People want to watch videos on their screens, not just read newspapers, so they don’t usually buy phones based on e-ink, but a select few options are available.
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