Comment by logicallee

Because systems, including servers, don't expose an abstraction of being permanent (always-on) storage that never gets suddenly lost (rebooted, loses power) for any reason at any time. How could you run a laptop with a server inside that cached 100GB+ of RAM? You would have to wait for it to load from RAM. Not so with the device I outline: if it has 48 hours of trickle charge (my calculations could be wrong but apparently it just takes mere milliwatts to refresh a DIMM), then as long as it has received power in the last 48 hours it would be instant-on. Everything you do is instant, EVEN IF it's written against software that writes to permanent storage.