Originally posted by Rico The only reason Ricoh has added 2GB internal storage is most likely that they are using UHS-I. The 2GB internal storage will be used by the system as a scratch disk space to get around the slow UHS-I standards. UHS-II brings a host of other benefits other than 3x times the write and read speeds. UHS-II has extra contacts that allow simultaneous communication in both directions which would eliminate the need for internal storage.
Actually not. Memory card keep the content when pulled out of the camera slots, the general term for this is Non Volatile Memory (usually Flash), which, regardless of the technology is slow to write relative to RAM. Access time for RAM counts in nano-seconds, address is decoded and data read/writing is immediate. Access time for any NVM counts in milli-seconds (writing to the Flash is 10000 times slower than RAM access times), concerns even the fastest memory cards such as XQD that resort to buffering (RAM internal to the XQD card on top of flash cells) parallel writing to avoid clogging the serial access. So, if Ricoh added further internal RAM, it is a very good choice, up to the camera to write into the SD card when the camera is not used when the user don't care about those things. We'll see how it's implemented.