Then I’d add that coal is cheap, and because of that, coal is almost 40% of the electricity in the world. If you want to replace it fast and effectively, for this kind of very large amount of energy, nuclear ends up being the only option.

Next about renewable, I’d think I’d insist on the fact that there is two main type of energy sources :
– the ones that are available on demand
– the ones that are not

And that there’s a golden list of 3 resources that are both renewable and on demand :
– hydro
– geothermic
– biomass

*If* you have enough of those three to generate all your electricity, then it’s very probably the best possible option.
A few selected countries have that option, and they already do it, like
But most countries in the world don’t have by far enough of those resources to do it, and that’s why they use so much coal.

The last added benefit is that those 3 have a reasonable cost (not true in every case for biomass, but…), so there’s really no reason not to choose them everytime it’s possible.

Then I’d add that the energy sources that are not available on demand can be used for at most around 20% of your energy need.
If you don’t have enough hydro, biomass and geothermic to provide 80% of your electric energy need than you need something in addition, and it won’t be renewal because you can’t provide the part you’re missing with something that’s not available on demand.