You are rather missing the argument. If KV SSDs are much faster than doing the same with a software DB on top of a block abstraction, is that not proof that the

You are rather missing the argument. If KV SSDs are much faster than doing the same with a software DB on top of a block abstraction, is that not proof that these are inequivalent? GPUs run software too, but that doesn't mean it's in anyone's best interests to run that on the CPU—not all software is the same, precisely because the hardware is different.