Many developed nations are reducing nuclear energy dependency as a matter of policy and preventing new reactors as a matter of regulation so dereg is a barrier that needs to be addressed for nuclear to become an alternative source in the highest carbon-impacting nations.

The key parameters in a nuclear build are:

1) the construction time (impacted by regulatory regimes)

2) the cost of capital (interest rate of tying up money)

3) an uncertainty factor about getting shut down (impacted by regulatory regimes)

In China, 1&2 are 3-4 years and 2% respectively. In the US they are 8-9 years, 15% and maybe 50% chance you'll be shut down before you can finish. [0]

[0] https://www.youtube.com/watch?v=d1EB1zsxW0k&t=1154

The UK is building a new nuclear plant and new offshore wind.

The nuclear plant has a strike price twice as high as the offshore wind.

It just isn't as hot right now as "renewables". What's needed is a good marketing campaign, people will follow, and so will imvestments. Downsides will be gleefully ignored, just like with solar.