Even if the app is no longer using that memory it is not released until Windows thinks another app needs it.

And then people complain about how unresponsive applications are, all these little stutters as things pop in.

Our storage can transfer Gigabytes of data, do hundred thousand operations every second. The hardware is more than capable. If your software stutter when streaming few hundred KBs of data, it's on you.

Bandwidth and latency are two different things. The latency of handling things in system memory is still pretty different than the latency of handling stuff on SSDs.

Still, it should not be more than few miliseconds, it's solid state.

Im pretty sure most of the latency come from the software.