Another way to look at is that the ratio between capacity and physical IOPS constraints have gotten exponentially better over time. It's just that you can't treat all that capacity as hot capacity anymore.
I recall a whitepaper on HP high-end storage arrays from over 10 years ago, their arrays already read and cached at least 256kB of data, even if you wanted only a 4kB block.
I recall a whitepaper on HP high-end storage arrays from over 10 years ago, their arrays already read and cached at least 256kB of data, even if you wanted only a 4kB block.