[liminalsunset]

An underrated use case for this would be for storage of sensitive information. Information stored on a non volatile device is difficult to erase (Format NVM/ATA Secure require power cycle, hard drives require time to actually wile). Even if the data is encrypted, it is vulnerable to xkcd's "rubber hose decryption".

With DRAM, the storage media itself is fairly volatile and power removal/memory content initialization should be much faster.

[halJordan]

Apple solved this problem at scale some time ago. Im not sure slamming ram on a pcie card is a better solution than including a piece of effaceable storage somewhere.