There are several forms of [Resistive RAM], but they all store data by changing the resistance of a memory site, instead of placing electrons in a quantum trap, as flash does. RRAM promises better scaling, fast byte-addressable writes, much greater power efficiency, and thousands of times flash’s endurance.
RRAM's properties should enable significant architectural leverage, even if it is more costly per bit than flash is today. For example, a fast and high endurance RRAM cache would simplify metadata management while reducing write latency.
...and plenty more, of course."