O'Reilly has an android and iOS app so tablets are an option instead of phones. I use a tablet for ebooks most of the time. Either Kindle or calibre (depending

O'Reilly has an android and iOS app so tablets are an option instead of phones. I use a tablet for ebooks most of the time. Either Kindle or calibre (depending on how I got the ebook). Lots of ebook apps have settings to reduce eyestrain. I'm used to tablets for reading now. I prefer that over the desktop experience. I still buy print if I think the book will require a lot of jumping between sections or use as a quick reference lookup later on. I know there are features to recreate that in O'Reilly Safari Online, Kindle, etc. but I personally feel they are awkward.