Earlier quoted context omitted.
I was actually trying out KOReader (on Android via F-droid) last night and it... looks promising... but better than the Kindle app, really? It doesn't have a dark mode which is basically baseline for me reading at night. Or am I missing something?
E-ink screens usually don't want dark mode, because of the weird way they have to refresh[0]. The effect of that is much more visible with white text on black background compared to the opposite. There's however a dark mode still if you need it; go to the gear icon, screen, auto warmth and night mode. Tap the mode line to switch it from automatic settings (either on time schedule or coordinates) to manual. [0]: Basic…
I hate the idea of my book collection being chained to Amazon by DRM, absolutely hate it. This whole DRM mess is one reason I haven't bought a dedicated e-reader.
Though, to be frank, it's not the only one, I spent a jaw dropping amount of money on a really good hardcover copy of The Lord of the Rings recently, and I feel like no ebook will ever come close to the reading experience of that thing. There is something about this immense, weighty, hardcover tome that just commands your attention and I still find that print on good paper causes less eye strain than even the e-ink screens I've used (though they are pretty good).