However, there are places in the world (Japan) where a modern design nuclear power plant is built in 3.5 years. South Korea is very close behind. And it's not just a one off. Japan built 8 new nuclear power plants and South Korea built 13 in last 20 years. These plants are every bit as safe as plants built elsewhere, perhaps even safer as they're new designs.
This suggest it is not technology that's holding us(US and majority of EU) back, but bad project management practices. We too could have a new plant built in few years.
Add to this SMRs (small modular reactors) which are hopefully becoming available in next 2'years and anyone that can't see nuclear is the only hope for decarbonisation is misinformed.
Then take a country like Germany that has recently shut down perfectly working nuclear power plants and opened the first new brown coal burning plant in Europe in a very long time (also they activated many others that were doing very little before). I don't know if this is irony or what, but when "green" efforts make an industrialised country give up nuclear and switch to coal there is something seriously wrong.
Also few words on the type of coal they burn there. There are (broadly) two types of coal. There is coal proper (resembles black stone, mined in deep mines, high quality, little sulphur and oil/tar content) and there is lignite. A brown smelly thing that crumbles when you squeeze it leaving a tarry residue everywhere. It's "mined" from just below the surface by gargantuan machines that destroy thousands and thousands of hectares of land leaving a moonscape behind. Why is it used? Because when you build your power plant next to a source of lignite the electricity is really cheap. This kind of "coal" emits a lot more pollutants when burned. This can be mitigated somewhat by using modern tech, but still it should be our last power source choice. Not first.
If the people say no to nuclear they'll not get renewable for base load, but lignite burning plants. BTW, CO2 is not really the worst these plants emit. They emit tiny particulates that get in your lungs. Incidence of child asthma is a lot higher near such plants as well as many other diseases.