On: 4-hour battery storage is cheaper to install than gas turbines all across globe

Of course. But the point was that it could also be burned in these turbines, and is also storable underground like methane.

The very small molecule makes it much harder to store than methane, and unlike anything else on the planet other than Helium, lost hydrogen is lost forever.

Hydrogen leaked into the troposphere is quickly oxidized back to water. Only very little makes it to the very upper atmosphere where it can escape.

Storage of hydrogen in underground caverns is demonstrated technology.

Interesting, thanks. I really should have double checked before posting on HN.