I recently started buying paper books. Yes, it's not particularly ecological, but I found that I'm able to focus at the text much better this way. My Kindle (despite plenty of obvious advantages) just doesn't really work for me. It took me years to realize this, but I always start to tinker with the brightness settings, switch pages back and forth, go into the book library and back, play with highlighting words, etc.…
The older I get the less I trust myself to know how to administer or even to care how to work any current or future reading e-device. A printed book requires light as just about it's only dependency! I definitely agree with you about the distractions of digital devices. Switching to a book is a focused mode.
Light being a dependency of reading a printed book is one of the biggest plus for e-ink readers. You don't need light, they already come with it! It's so much easier reading with a Kindle (in dark mode) at bed time than it is a paper book.