Well you can look at the rollout of renewables vs Nuclear in the UK

https://www.youtube.com/watch?v=ycNqII5HYMI

tldr: Nuclear power plants are expensive to build (complicated to build), expensive to run (need well trained staff to handle the complexities), the stuff that they run on (Uranium) isn't easy to acquire, and on top of all this the waste product is difficult to dispose of, I believe in Germany for example when the power company shut down its Nuclear power plants it told the Germany government they can deal with the nuclear waste... so basically even though the german people get 0% of their power from nuclear power plants they pay every day to store the nuclear waste from previous ones that are no longer operational...

... and when things go wrong they REALLY go wrong

Coal on the other hand is relatively cheap, the technology is fairly simple, running them is fairly cheap, there's no radioactive waste the coal power plant has to deal with etc