I never understood why hydrogen is so loved by some. There are major issues with hydrogen.
1. If you can use green energy to make hydrogen, why not just store this energy in batteries, pumped hydroelectric, etc. instead and save efficiencies lost in combusting the hydrogen again to release energy.
2. It is really hard to store hydrogen, since the atoms are so small they fit through the tiny gaps in many materials over time.
3. If there is a kinetic accident, then you have an ugly chemical reaction to hide from, H2+O2+ignition = kaboom.