1. Hydrogen distribution might be able to use/share natural gas infrastructure (not high yield so embridlement isn't as big an issue)

2. Hydrogen is used for chemical processes (refining/ammonia) that can serve as a first step even if use for energy storage never becomes feasible.

3.Hydrogen is cheaper to store (<$10) per kWh than basically anything else (>$50).

But it basically won't be relevant until we have 12 hours of storage and zero marginal cost electricity 50+% of the year. Then it may be cheaper than overbuilding renewables or capturing gas emissions to cover the last 10-20 percent