I'm skeptical of most proposed hydrogen uses. But there are places where it works really well or is even irreplaceable. According to the fine people over at BloombergNEF (like [@solar_chase](https://mastodon.green/@solar_chase )) green hydrogen will be cheaper than 'grey' hydrogen already in some places in 2030: https://about.bnef.com/blog/green-hydrogen-to-undercut-gray-sibling-by-end-of-decade/