I've wished for years that there would be an actual e-ink only laptop. Or (even better) an aftermarket e-ink screen for my current laptop, because I'm quite happy with the rest of the machine.
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It featured a netvertible design that had a regular screen on one side and an e-ink on the other. I thought that was a pretty good idea, though this laptop had some questionable decisions, like only usb-c as IO.