This article makes it pretty clear that if the Kindle doesn't emit light, it's ok. The experiment was done with an iPad. Kindles were designed with this issue in mind, so I think posting the article in this manner is misleading.

I need to bounce around in a book. Flipping physical pages is way easier than scrolling around in an ebook reader.

I do most of my reading on physical books, but I have the core of my library on a Kindle as well, and where it shines is search. I can phrase and keyword search the larger part of my library. It has become an invaluable research tool. I also import highlighted passages into a database on my computer. Granted there are things like books.google.com, which I could use for search, but that's not my library. I also prefer to read on a Kindle compared to my monitor, so I regularly email large documents to it. My wish for the next Kindle is for it to be faster (more responsive UI) and handle even larger libraries.

my bedroom theory is that our brains like to associate physical stimuli to ideas, and flipping through pages is a lot more giving than typing a page number or swiping.

Personally, I don't usually retain much, ebook or physical book, unless I take notes, and I find ebooks make such note taking a lot easier.

Taking notes on paper can help you retain more:

https://www.scientificamerican.com/article/a-learning-secret...

http://www.npr.org/2016/04/17/474525392/attention-students-p...

If I don't have paper nearby, I write in the margins and dogear the pages, and then refer back to the book to extract the information later. I keep a few pens and pencils in my pocket at all times.

Those articles are about students taking notes on laptops during lectures, which Ibthink is a pretty different case to taking notes while reading a book.

Reading on a phone, I get the ability to look up unfamiliar words immediately, add them to my spaced recognition tool if they seem useful, add quotes to my quote file, and arrange notes on new things learned either per book, or on a per project basis. In addition, taking notes like this they are still available over the years, and backed up in multiple places, whereas the paper notes I have taken are either filed away somewhere or lost during one of my moves.

I agree. Note making is very important for me if I wish to study a subject deeply. Besides, I can always refer to it later.

Recent Kobos have night mode, vastly reducing blue light.