Existence of cache comes from trade-off between speed and cost, so it will quite likely never disappear. Notice how there are many layers of cache in current sy

Existence of cache comes from trade-off between speed and cost, so it will quite likely never disappear. Notice how there are many layers of cache in current systems: HDD <-> HDD Cache <-> RAM <-> L3 ... <-> Processor registers. If you get your mass storage as fast as registers then perhaps .