pokoko on 21 February 2013
"2) Sony always planned on having 8GB of RAM in the final retail unit, HOWEVER devs and others only knew about 4GB because the rest was secured solely for all the always on information behind the games."
That would be my guess. They were playing it safe because they weren't yet sure about how much RAM all the other stuff was going to take. It gave them wiggle room to add anything they wanted to the OS functionality.
Also, does anyone have an idea how much 4GB of GDDR5 RAM would cost Sony?
