And of course, as the site has yet to be built and cost projections are often optimistic, we'll have to see. If the company realizes at some point that they're going to take a bath they may not finish it, or will try to re-negotiate their contract. Still, very encouraging, although it hardly kills nukes - that was effectively done here in the U.S. many years ago owing to public resistance rather than cost. 4 hours of storage is fine for evening peak loads, but doesn't cover longer periods of low RE production, which will still require NG, hydro or some other source.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].
The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.