is there such a thing as an ephemeral SD card that is backed by RAM rather than flash memory?
that is to say, non-persistent storage, useful only as a "ramdisk" of sorts for temporary files and/or swap.
i guess this applies to anything that can be wired up to the same pins, so something SDIO but not necessarily the form factor of a (micro)SD would be fair game.
i ask because this would be super useful for swap on a lot of RAM-limited systems where you don't wanna worry about flash write cycles.
@lifning I wonder if someone out there has made a controller to do this backed by like, old SODIMMs or something.