How is that different from nuclear? Half of France's power plants are offline. That's not reliable at all. Building new nuclear power plants also takes too long.
We're talking about Sweden that has high amounts of hydro power available for storage.
France didn't maintain their nuclear plants during COVID-19 and as a result suffer the consequences now (or rather all of Europe). Furthermore the heat has only made for less than half percent of lost production.
We're talking about Sweden that has high amounts of hydro power available for storage.