I think this is a generational thing, but I cannot read more than a page or two on line. Although this year, I don't have as much reading to do for my program as last year, I admit, I print out all of the articles. How else could I highlight and make notes for myself? Since this is a reading strategy that good readers do, I can't see how I could do it on the computer.
I keep all of the articles from my classes, but I guess if I ever feel the need, I would put them in my weekly recycling.