The problem is that the scaling law goes in two directions, things becoming (potential exponential) cheaper because they are done (produced) a lot and things be

The problem is that the scaling law goes in two directions, things becoming (potential exponential) cheaper because they are done (produced) a lot and things becoming _(potential exponential) more expensive_ because the scale you try to archive so so much beyond what is sustainable (or in other word the higher the demand for a limited resource becomes the more expensive it becomes). Similar this law isn't really a law for a good reason, it doesn't always work. Not everything gets cheaper (in a relevant amount) at scale.