Oh! This is interesting. I've found that I struggle to comprehend things when reading on a screen as opposed to reading on paper, and I figured it was just me (being old and all). It's one thing to do a quick perusal of something, but if I'm actually going to sit down and read a book, I need to actually read the physical book to get the most out of the experience. I'm glad to know it's not just my aging brain that's the problem but an actual thing that happens to people.