Hydrogen has one advantage, it can be generated from excess energy on the grid
True, but to do that, you'll need much more hydrogen generating capacity, and much more solar/wind farms. And still, that doesn't cover the energy needs in winter.
I think you missed the point about storage, you can store hydrogen just as you store natural gas, it can be turned into liquid as LNG, it can be stored in pressure tanks it can even be stored in salt caverns. Or if you have the energy to spare you can simply transform it into methane gas, it's like one of easiest chemical reaction in the world, especially if you're in a pinch and you already burn coal.
We've had negative prices several times this year too. In a country where most houses don't have airconditioning, solar energy has a very low economic value during the hours that it's most productive.
And there you have it, use that energy to produce hydrogen, rather than throwing it away or letting that sunlight go to waste as it heats the roofs when you don't need it, in Netherland you actually have few options, it's not like you can build a pump storage dam anywhere to store energy.