Hydrogen production is still very costly and energy inefficient. If we had excess renewable energy, this may not be a problem, but today it's an issue, especially if you're producing hydrogen using non-renewable energy sources.
If anything, this hydrogen technology should be the excuse we need to immediately focus on renewable power buildout.
And whose gonna pay when marine life collapses and shellfish cant make shells because the all of the oceans’ ph is off? Hell there might not even be a need for money because there might not be anyone left!
on top of that, there are lots locations around the world that are underdeveloped but do have the potential for turning their renewable resources into an export. That would be an almost silver bullet. to uplift developing nations by selling developed nations green energy.
If we can get the conversion cost effective, and the transport and storage reliable and cost effective then we can change the world for in a bigger way than the internet has.
I'm somewhat optimistic that HFC will play a role in the future of transportation, but there are still a lot of issues that need to be ironed out.