Analogies are unhelpful here. I don't need an analogy to help people understand that different kinds of memory have different characteristics. I can just say it

Analogies are unhelpful here. I don't need an analogy to help people understand that different kinds of memory have different characteristics. I can just say it. It is easier to understand if I simply state that there are different kinds of memory, and that they have different constraints in terms of speed, density and power. That is really, really easy to understand and from there I can accurately reason about it. I don't need an analogy to understand any of this. Just saying that different kinds of memory have different speed, densities and power consumptions explains everything and provides all the intuition needed.