What kind of storage do you use when chasing the 5-10ms improvements? I ask as someone working on super fast storage and memory and it's not always easy to fin

What kind of storage do you use when chasing the 5-10ms improvements? I ask as someone working on super fast storage and memory and it's not always easy to find people who are aware of the differences in latency. I imagine you're already on NVMe SSDs, but if not, I'd be curious why (i.e. is software more of the issue than hardware?).