I'm pretty sure there is a safe enough way to transport hydrogen, even if all the kinks haven't been worked out yet. And building infrastructure and everything is just more minor minutiae to figure out. I still have the question that I find ACTUALLY relevant, and that is: WHAT IS IT GOOD FOR???
What problem is it made to solve, and does it actually accomplish that? It's new! It's exciting! It's expensive! La-De-Da! What's it good for??
It takes energy to produce hydrogen. There is no natural source of it, therefore it is merely a means of STORING energy. As such, is it a net gain or a net loss? Obviously we could have just burned the stuff in an ICE DECADES ago, but we didn't. Why not? That tells me it would be less efficient and cost-effective than EVERY other form of fuel that we DO use. Yes it was used in space and such where EVERY other means of generating enough electricity would simply not work. That speaks volumes too. Now we have a terresterial model almost ready, and the idea is that by using it in a fuel cell, hydrogen is efficient enough to make sense. Does it? Where are the numbers?
Anyone actually WANT to pay $50k for a hydrogen powered Accord? Why? I want a car with a jet-turbine engine. Does it solve any probelms, other than my desire to go REALLY FAST? NO! It's a complete impracticality from every perspective. It would be just a TOY. Someone MIGHT be dupped into thinking that a hydrogen powered car is 'greener', but that's only because they are FAR removed from the production process of hydrogen. And cars.