Hydrogen is unlikely to be a solution for consumer cars and...

Hydrogen is unlikely to be a solution for consumer cars and that's ok. Instead, think of applications like green hydrogen storing energy from wind/solar, using it in shipping applications. It's most likely not The Answer but one of many elements:

From the International Energy Agency:

• In transport, ...shipping and aviation have limited low-carbon fuel options available and represent an opportunity for hydrogen-based fuels.
• In buildings, hydrogen could be blended into existing natural gas networks, with the highest potential in multifamily and commercial buildings, particularly in dense cities while longer-term prospects could include the direct use of hydrogen in hydrogen boilers or fuel cells.
• In power generation, hydrogen is one of the leading options for storing renewable energy, and hydrogen and ammonia can be used in gas turbines to increase power system flexibility. Ammonia could also be used in coal-fired power plants to reduce emissions.