For me, I'm pretty sure this is what is taking place.
Paging is not new, however from flash directly it is.
Normally caching happens off of the DRAM. The sequence is, load the DRAM from flash, or shadow and then cache(SRAM) from the DRAM or SDRAM.
They're doing it directly from flash.....and it's what is taking place in the footprint of the flash matrix that allows it.
emit can send notes, I'll watch and see if they respond....lol
doni