FWIW, none of the ISOs I mentioned have the ability to order natural gas to flow either. What they do have, and Texas does not, is a contract with the generators that requires the generators to offer their supply to the market regardless of the price of gas (and associated risks). This doesn’t help if gas isn’t available but generators are not allowed to say ‘buying gas was too expensive or risky or we went home for the evening’. In exchange for signing this contract, the generators receive constant and regular payments during the year for their ‘capacity’, i.e., to be ready and willing to run when called. These payments are significant. This doesn’t always work but it is a notable difference.