Only short-term unless the supply is static.

That’s not at all how economics works. Unless a technology breakthrough comes in that reduces cost at scale, increased demand increases price.

The only exception is if producers are already selling at essentially the marginal cost of production for the whole industry. This scenario is extremely rare, especially in base materials.

Economies of scale can happen just fine without technological breakthroughs.

They didn’t happen before engineered stone, why?