[gpderetta]

"memory hierarchies can ameliorate useful sets of latency requirement"

Not the latency for commits to stable non-volatile storage, unless battery backed RAM is an option.

[hga]

Or just a big enough capacitor to finish the necessary writes to flash memory. Which as I understand it is one of the things that distinguishes enterprise from consumer flash drives, and one of the reasons I use the slowest, smallest Intel enterprise flash drive for system and /home.