And like I've said before, Kindles are slow eInk readers designed to read mobis and their successors. They are no good for reading a lot of PDFs. I'm sure Amazon assumes that someone who reads a LOT of PDFs on a portable device will use a tablet rather than a clunky eInk reader. There will always be a few oddballs who think they should read technical PDFs on an eInk, but most of the people buying a Kindle eInk won't do that. PDFs take up a lot of storage space because they are big files, but mobis don't. So there is little need for adding complexity to the hardware and increasing the price even if by only $0.10 when most consumers would neither need the extra memory nor want to pay for it. It seems to me to be overkill to have 32 GB of storage on a Kindle. Even if your average eBook was 4 MB, that would be roughly 8,000 eBooks. Even if you read one book per day, it would take you nearly 22 years to read all of them. You might live that long, but the Kindle likely won't!