I just received my 15" Retina MacBook Pro and I had a question regarding the flash storage drive. I was under the impression that flash storage is really great for boot times and app launch. Essentially for reads flash drives are best. But, for write times they are so so. Also, I read that flash drives will degrade over time with reads and writes. Today I'm reading that flash drives will degrade over time, but the computer will probably be replaced before that ever happens. I also have an older mac pro that I installed a SSD drive in to give it more pep. It seems the consensus then was to set up the SSD as the OS and application drive only. For document and settings point those to another internal drive. Should I be using some type of external drive for my documents? Like I've done for my tower. Or, is it fine to just use the flash drive for everything?