This is a commonly propagated negative fact about hydrogen, it causes some loss, but not prohibitive, hydrogen tank technology is already mature, tons of practical tanks and actually all hydrogen hardware available on Alibaba etc. Many companies working in hydrogen. A US company is Plug Power, recommend you have a look at them.
That negative fact about hydrogen containability is maybe not so negative, if we realise its chemical simplicity is also it's greatest strength, it's the reason why hydrogen is so useful. I pointed out how it can be used to make Solein (food), but in addition, it also makes fertiliser by mixing with nitrogen to form ammonia, this is the basis of modern artificial fertilisers, but the advantages of that are complex, maybe conditional, so not something I highlighted.
For sure there will be alternative hydrogen based plastics technology that we might benefit from. Going by the Energy Multiplier Framework, (and theory) , we should expect many hidden benefits like this to come out, because the source energy is mathematically positive, the multipliers can never be negative.