I'm going to be a contrarian simply to expand horizons. I abandoned e-ink devices some years ago as I found contrast and sharpness lacking, background "color" virtually nonexistent, and the "front-lighting" LEDs providing more glare than actual lighting of the screen.
I bought an 8" Kindle Fire (yeah, I know, it's not e-ink) and all of the above deficiencies weren't present. Yes, it's heavier than an e-ink Kindle (but it's an 8" screen which Amazon doesn't offer). I'm sure an e-ink Kindle gets longer battery life but that hasn't been an issue as it uses the same charger/USBC as my phone and, as my phone needs to be charged daily, I don't mind plugging in the Fire for a few hours weekly. I read with the sepia background and that is easy on the eyes. I read in open shade outdoors and do have to slide up the brightness almost all the way; however, once back inside, I can drop the brightness by half and can read for hours without eyestrain.
I did look at the Scribe (online only at this point) as the screen size of 10+ inches is intriguing but the cost is prohibitive considering I only want a reader and not a note-taker. Maybe Amazon will recognize a need for such a beastie at, let's say, $199. No, I'm not smoking weed.
Until then, I'll stick with the 8" Fire.