You conveniently omitted the storage vessel factor from the energy density. And it's definitely not comparable to natural gas in other respects too, such as hydrogen is corrosive and needs special alloys or nonmetal materials.
Superconducing wires are already and increasingly used in practice. Even without superconductors we can just keep raising the voltage and use copper, there are new silicon carbide power transistors that make it possible. We aren't near physical limit yet.
Other assertions of yours are likewise unfounded, too.
I can totally see hydrogen airplanes but for cars it's too little too late.
From a theoretical standpoint, you don't need to worry about that. You can conceive of metal hydrides or other forms of dense hydrogen storage. Even as LH₂, you're still looking at around 2700 Wh/L of energy. That's well beyond any known rechargeable battery.
And the "special alloys" really just mean certain types of steel alloy, and "nonmetal materials" really mean certain types of plastics. This is not a big challenge.
You still need very low temperatures and exotic materials for superconducting cables. Not to mention the power generation needed to sustain that level of power draw. This is a long-term problem that we're nowhere near solving.
As I said before, this is not a race and there is no finish line. There's nothing stopping fuel cell cars from displacing EVs at an arbitrary point in the future.
As soon as everyone agrees to build more nuclear power... We're not anywhere near ready to use anti-matter, but the next best thing faces extreme opposition for some reason.
Hydrogen is pretty much a solved problem too. Most of the critics are just stuck in 2010 or earlier.
I did not have primarily nuclear in mind, but obstacles to extending long-distance electric grid to support renewables. But hydrogen pipelines are going to have even worse problem with this. And you did not really debunk any of my "stuck in 2010" criticism.
Superconducing wires are already and increasingly used in practice. Even without superconductors we can just keep raising the voltage and use copper, there are new silicon carbide power transistors that make it possible. We aren't near physical limit yet.
Other assertions of yours are likewise unfounded, too.
I can totally see hydrogen airplanes but for cars it's too little too late.