Imo it's a good bet for Sweden. They don't get as much sun as other countries. Providing the same energy as nuclear in a stable maner (when I say stable I mean more that 3-4hrs of backup from batteries) is hard with solar, wind sounds better but has downsides too. And also, why not both? Sweden is already among top cleanest energy countries. They can afford to make longterm bets in reliable nuclear energy. They already afaik almost finished their storage site. Maybe building more nuclear will make further building cheaper by growing expertise in this field, anyway, thing is, they can afford to think long term, it's up to other countries to decarbonize, like, say, Germany that refused to keep their nuclear on to make transition smoother and are bashing on France bc they have too cheap nuclear energy