Even that advantage for hydrogen is limited. It's quite corrosive, and leaks easily. It has to be compressed at extremely high pressures to achieve that density

Even that advantage for hydrogen is limited. It's quite corrosive, and leaks easily. It has to be compressed at extremely high pressures to achieve that density, making storage even harder. I never understood why Japan thought hydrogen was a good bet. If they were really that invested in internal combustion, why not turn that hydrogen into hydrocarbons? There's even more energy loss, but at least you can use the existing distribution infrastructure, and not touch your engines. They really look like they're leaning heavily into a sunk cost fallacy. Surely it can't be that simple.