Comment by rbanffy

There’s also the very likely possibility that the storage is lying to the OS, that the data that was accepted and which is in the buffer has been written somewhere durable while it’s actually waiting for an erase to finish or a head to get wherever it needs to be. There are disk controllers with batteries precisely for those situations.

And, if cheating will give better numbers on benchmarks, I’m willing to bet money most manufacturers will cheat.