https://www.theregister.co.uk/2019/08/26/understanding_memory_hierarchy/

Sponsored Flash memory has given a welcome boost to enterprise storage over the past decade or so, allowing applications to overcome the limitations of spinning disk storage systems. This has enabled common enterprise workloads such as databases, business intelligence, and online transaction processing to get faster access to data and deliver increased productivity.

But there are signs that this may not be enough for much longer, as the demands of applications – such as big data analytics – continue to grow, and new and emerging workloads place further demands on storage infrastructure. Can new technology approaches, such as storage class memory, provide the answer?