What if I hope for a genie to emerge from a lamp in order to grant me wishes?
121 karma · joined October 15, 2016
In general, though, whether NAND or NOR, the fundamental way that flash works is by creating an isolated voltage charge for each bit (or several bits, for TLC), making it effectively a vast grid of very tiny batteries.
Like all batteries, no matter how well-stored, they will eventually leak energy to the point where the voltage levels change enough to matter.
Further, it's not enough to simply make power available to this grid since the refresh of the cells requires active management by a nand controller chip and its associated software stack.