Hydrogen will not be a threat to any electric personal vehicle simply because it’s 3x less efficient (electrolyze water to split it) and thus 3x more expensive to run.
Really just a meme at this point. The risk here is that hydrogen cars end up being cheaper to run than electric cars. A real possibility due to the production of hydrogen from curtailed renewables, higher battery costs, hydrogen being much more efficient than believed, as well as cheaper distribution costs since hydrogen can be piped in natural gas pipelines.
> hydrogen being much more efficient than believed
God/Allah/Nature obviously don't understand disruption, growth mindset and can-do-spirit. facepalm
There are hard physical limitations that no amount of human ingenuity can do anything about. 237kJ/mole is the theoretical minimum of energy required for water electrolysis. energy->electrolysis->energy round-trip efficiency won't exceed 45%, even if everything, from the energy source to the car wheel spinning, is perfectly frictionless and operating at peak theoretical efficiency. No, you cannot use existing gas pipelines for transporting hydrogen.
For passenger cars, EVs today are already better than what physics allow hydrogen cars to ever be.