Not true. Stick them to a carbon-based backbone and they become energy dense and easily-transported liquids at standard pressures and temperatures. The result

Not true. Stick them to a carbon-based backbone and they become energy dense and easily-transported liquids at standard pressures and temperatures. The resulting chemicals are able to take advantage of massive existing infrastructure, too. (This may sound somewhat on-the-nose, but one of the biggest lessons 'hydrogen-gas-is-the-future' hype has to teach is just how useful hydrocarbons are compared to any other method of chemical hydrogen use.)