well ... I guess now that , that is behind us.
I would also like to add at least a few more thoughts to the concept of a Hydrogen fueled ICE.
While the ICE is less efficient than a fuel cell ... it is also much less expensive than a fuel cell ... and a ICE running on hydrogen is about as clean for emissions as a ICE will ever get.
Also the same ICE can be converted to run Hydrogen or gasoline or any mixture of the two.
There is also anther advantage to hydrogen fueled vehicles , ICE or fuel cell... and that is ... energy density per unit weight ... Hydrogen is the lightest element ... the weight of the hydrogen is very light compared to an equal energy wh amount of batteries or any hydrocarbon like gasoline.
~39 kwh/ kg for liquid hydrogen compared to ~13 kwh / kg for gasoline
3 to 1 Hydrogen advantage.
Unfortunately ... the energy density per unit volume ... is the killer for hydrogen storage ...
~2.6 kwh / L for Liquid Hydrogen compared to ~9.7 kwh / L for gasoline
~3.7 to 1 advantage gasoline.
plus of course anything being fueled by hydrogen has to get the hydrogen produced in the first place ... and transported ... and stored... and it is each of these three areas that hydrogen becomes a dead end ... unfortunately for those who have invested in the hydrogen economy.
That might change in the future ... but there are some serious technical problems with each of those three areas ... which all will need serious improvement if a hydrogen economy would even come close to being competitive.