Optane SSDs had been great! They have the fastest write latency which made them e.g. perfect for databases or the ZFS ZIL which is a write of any new block to a

Optane SSDs had been great! They have the fastest write latency which made them e.g. perfect for databases or the ZFS ZIL which is a write of any new block to a special space (on that optane ssd) that will later be rewritten to the slower ssd.