1.

A McDonald's cheeseburger costs $2.59 despite a global supply chain with thousands of process steps — the DoorDash delivery alone is more expensive than every step combined. Brian Potter argues stone construction's simpler supply chain is a real advantage, but one that economies of scale have already made irrelevant, and that no amount of automation can fix.

2.

Stone's supply chain is genuinely simpler — and that matters

• Concrete requires crushing rock, heating limestone in a kiln to make cement, then mixing with water, sand, and admixtures; steel requires beneficiation, blast furnaces, basic oxygen furnaces, and rolling mills
• Stone is quarried, carved, and shipped — no heating, no melting, no chemical reactions, no multistage processing
• Energy costs reflect this: 20–30% of concrete's cost and 20–40% of steel's goes to energy; stone has no heating steps and consumes far less

3.

But economies of scale make extra steps nearly free at volume

• Semiconductors require more process steps and more expensive fabs every generation, yet unit costs fell for decades — shrinking dies and larger wafers offset added complexity
• A T-shirt shipped from Bangladesh to the U.S. costs a few pennies in transport; the global supply chain for a $2.59 cheeseburger is cheaper than a single DoorDash trip of a few miles
• Steel and concrete use continuous process machinery and bulk methods like blasting — the "extra" steps are amortized across enormous volumes, making their unit cost almost insensitive to complexity

4.

OSB vs. dimensional lumber proves the point with identical automation

• Dimensional lumber is cut directly from tree trunks; OSB is chopped into tiny pieces, glued with resins, extruded into sheets — a far more complex process
• Both use highly automated manufacturing, eliminating the "stone just hasn't been automated yet" objection
• On a board-foot basis, OSB is cheaper than almost every type of dimensional lumber, sometimes dramatically — complexity wins when volume is high enough

5.

Stone's mechanical properties are a statistical minefield

• Steel, concrete, and engineered lumber average out raw-material variation across many small pieces; natural stone retains every flaw and impurity
• Determining structural stone's safe capacity requires testing many individual samples and performing complex statistical analysis — one IStructE article spends a third of its pages on which Weibull distribution to use
• Design strength (what you can actually rely on) is far below theoretical maximum, reducing or eliminating stone's theoretical strength advantage over concrete

6.

Stone can't flow — and that's a structural death sentence

• Concrete pours into forms and cures; steel is hot-rolled or cold-formed into efficient shapes with high moment of inertia — thin, continuous slabs are standard in high-rise construction
• Stone cannot be handled in a flowable state; making efficient shapes requires extensive cutting, and installing connectors or post-tensioning cables requires drilling very long, straight holes
• Standard thin slabs are impossible — Webb Yates proposes corner-supported stone squares, a geometry that trades structural efficiency for material purity

7.

Code, supply chain, and workforce adoption take decades — stone has none of them

• Mass timber advocates have pushed for over a decade in the U.S., had European and Canadian movements to build off of, and it remains extremely niche — stone has nowhere near that advocacy
• A novel building system needs code pathways, officials willing to sign off, a robust supply chain, designers who know how to use it, and workers trained to install it — stone has none of these
• Even if stone were cheaper at maturity, the path to get there would be long and burdensome, and right now the will to push it forward doesn't exist

8.

The entire cost comparison is based on a material that doesn't exist yet

• Potter's central claim — that stone's simpler supply chain is overwhelmed by economies of scale — compares today's automated concrete and steel with today's unautomated stone, then extrapolates from OSB and semiconductors to argue automation won't close the gap
• But the pro-stone case is explicitly about future automated stone, and Potter concedes "finishing stone can be automated (it obviously can), or whether that will reduce costs (it obviously will)" — the only question is scale effects, and nobody has run a high-volume automated stone operation to test them
• The OSB comparison is Potter's strongest evidence, but he buries a critical caveat in a parenthetical: his own 2024 estimator shows OSB coming out more expensive than dimensional lumber — the one data point that directly tests the "complexity wins at scale" thesis actually contradicts it

9.

The real question isn't which material is cheaper — it's which material can be built with fewer people

• Both Potter and Springut frame this as a cost competition, but construction's binding constraint isn't material cost — it's labor availability; the U.S. faces a chronic shortage of skilled trades, and every material that reduces on-site labor has an advantage that raw cost comparisons miss
• Stone's simpler supply chain and elimination of cladding, drywall, and painting steps don't just lower theoretical cost — they reduce the number of skilled workers required on a jobsite, which is the single most expensive and scarce resource in construction
• If automated stone can be installed by a smaller, less specialized crew, it doesn't need to beat concrete on a board-foot basis — it needs to beat the total project cost of a building that can't find enough masons, drywallers, and painters to finish on time