I have to read plenty of PDFs (imagine recent research articles) and have many books in PDF format I bought (a single photography/visual art book PDF can be easily 100MB) - if Amazon had incorporated a silly microSD card slot, I could stuff everything I got into it. Now my Voyage is relegated to "hot items" only, the ones I need to read right now, and often I don't bother. Now what is the cost of a microSD slot? $0.20? They insist on some silly business model and they just ruin it for the resourceful clients that don't want to waste time switching between multiple devices, could buy a lot from them and inspire other people to "ape" after them as well. Now I rather stuff a 200GB microSD card into my Android phone (iPhone has the same issue), put everything there instead and buy ebooks elsewhere. Win for Amazon?