I have to sit at the computer to do all classwork. I can't cuddle up on the couch with that fuzzy feeling you get from holding a book. And at this stage, cross-referencing is a problem, especially when the viewing software doesn't allow switching back and forth between other programs. It was a good memory exercise. It saves time not to read an entire textbook, and it saves trees not to print an entire textbook.
Computers also bring their own brand of simplicity.
When it's 2 a.m. I just go to the right bookmark. There's too much material to cover the nuances during class. I guess it boils down to volume and wear and tear on the eyes. I spend so much time at the computer, it's a relief to look at a page every now and then.