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I'm highly interested in this topic, but I have to get back to studying for exams. Be back to really try and contribute "from the front lines" sometime later...

One quick thing I will say: I've had philosophy readings assigned online. Prof posts a file to an online suite, and I download the PDF. It's not easy or natural to edit, highlight, or annotate a PDF, unless I'm missing something. It just doesn't cut the mustard. I find I learn best with a concrete book to read and understand the material. With that in mind, it is very valid to criticize fancy graphics, an overload of material, and inflated prices. The publishing industry needs an overhaul.