Write amplification is a concern on flash memory. The other secret is that just like flash didn't eliminate the cost of seeks, RAM isn't as fast for random acce

Write amplification is a concern on flash memory. The other secret is that just like flash didn't eliminate the cost of seeks, RAM isn't as fast for random access as sequential. All modern systems benefit from data locality, to varying degrees. A CPU has layers of caches in front of memory, which then has its own caches on front of NVMe, which has its own controller usually with an SLC cache in front of MLC, which often times is being used as a cache on front of the network or slower storage. For many problems modern hardware is fast enough, but if your problem is attempting to make use of all modern hardware offers, you need to optimize for it. Meaningfully saturating a 100gbps network connection, for example, is hard to do without considering data locality.