There is nothing "secret" about the challenges of turning energy into hydrogen and then back into heat or electricity. The challenges of each step along the en

There is nothing "secret" about the challenges of turning energy into hydrogen and then back into heat or electricity. The challenges of each step along the energy chain are pretty well understood. You make the naive assumption that you temporarily storing hydrogen in a tank with 1.3mm thick walls that needs to last for, at most, a couple of days, has any relevance for permanent energy installations. If you are going to argue for an energy storage technology you have to consider what it would actually look like in practice. And since you only want to consider one part of the chain: I suggest you look into what it takes to safely store hydrogen in a vehicle and how this compares to your naive belief that hydrogen behaves like liquids that you have an intuitive understanding of. (Spoiler: you'd have a hard time convincing authorities to let you drive around traffic with a 1.3mm thick tank in the back of your car). Then again, I don't think you want to actually know anything about this. I think you only want to argue and you are annoyed that someone called you out.