Kindle versus Nook
When Amazon banned all books by the late Joseph Nicolosi, I began buying many of my books from Barnes & Noble, including Nook books (their version of Kindle).
I’ve got to go back to Kindle. The Nook App for iOS does not work smoothly for highlighting passages. It gives a very nice presentation of highlights you choose to share, on Facebook for instance, but unlike Kindle does not make highlights available online as does “My Kindle Highlights” at Amazon.
I read too much nonfiction, and too greatly value capturing highlights in my DEVONthink database, to put up with that limitation.