Yeah, I'd read somewhere about noise being a big problem with flash memory.
Wonder if anyone has patented the idea of cryogenic Flash storage yet?
Cool chip(s) down to -50C using a liquid phase cooler based on a mixture of alcohols and freon etc and a massive Peltier array or vacuum thermoelectrics.
If it works for large CCD chips then memory ought to be a walk in the park.
Additional hack:- use the new superconductors for processing that work at -40C, once someone gets the useable fraction up to say 70% this should be simplez.