[pfdietz]

Europe has like 100x the salt cavern capacity needed. Hydrogen can also be stored in deep aquifers or hard rock caverns.

Using the 2030 data is proper, since any nuclear reactor we begin to build today won't be available until about then (which renewable and storage systems can be built in just a couple of years.)

Some of their cost figures are already too high, btw. Their 2030 estimate for the cost of electrolysers was 600 euro/kW; it's already down to half that (or even less, in China).