[nickpsecurity]

Far as DRAM state, the separation kernel keeps the state of one process separate from another. Harder to do with a cache without defeating the performance-enhancing purpose of a cache.

"in fact DRAM effectively has an SRAM on-chip "cache" keeping the current active row per bank."

Had no idea. That could be a problem. See why we systems people defaulted on physical separation during most of the Moore's Law advances? Never know what hardware issue will pop up.