My question, why ? Because the system need space for programs (game) increasingly hungry for memory, in this scenario is hard to believe they've built the machine with some capability of the GPU to share and then have full access to system memory, mainly to the kernel reserved one, at least it's unbelievable for a GPU with 4x64 GDDR3 dedicated modules built-in.
But never say never.
Yep, those versions (till CECHQxx) keeps only bootloaderS on the flash and installs everything else on the HDD... and... ...good thing, those ones are "battle-model" not rare collector items.
Every newer firmware till now seemed to use lesser memory but's not about how much memory the system use for the kernel "now" but at the beginning, thinking at the fact the harware is the same and they cannot change it after sold but they can change the amount of memory needed by the kernel ...and this is what's happened every new firmware.