Canada

The problem with using nuclear as baseload is that people have the wrong idea of what is required from a baseload power source.

A baseload power source's most important quality isn't constant output, it's rapidly adaptable output.

When it comes to cost, nothing beats solar. It's cheap, it's individually owned and especially with a battery the self-sufficiency basically means not paying for power anymore. So, people will adopt solar at greater numbers as the cost of solar panels is still dropping.

Solar and wind at peak times in several countries already exceed the demand. Nuclear, which is more expensive to run, now has a problem, because nobody wants to buy that energy. They'd rather get the cheaper abundant renewable power.

So, the nuclear reactor has to turn off or at least scale to a minimal power output during peak renewable hours. This historically is something nuclear reactors are just not good at. But even worse, it's a terrible economic prospect: nuclear is barely profitable as-is, having to turn it off for half the day kills the economic viability completely. Ergo, government subsidies are required to keep it operational.

Flexibility is king in the power network of the future. That means batteries or natural gas plants at the moment. Nuclear can be useful for nations without those and with a lagging renewable adoption, but it will be more expensive in the long run. It will also become more important to do heavy industrial tasks during peak renewable hours, so that the demand better matches the output.