Renewables are also intermittent and strongly tied to geography. Geography is especially limiting in much of Europe which isn't particularly sunny, and where much of the low hanging fruit for wind, geothermal, and hydro has already been tapped.

And even if you were able to keep building it, you will soon run into the storage problem which is still potentially more costly, especially when trying to provide baseline power for the whole year, where it's buildout may have to be many times more expensive to save power for months than a baseline solution like nuclear which can provide steady power all the time.

So, some mix of baseline solutions like nuclear and intermittent solutions like renewables will be needed to completely phase out coal, oil, and gas which provide our baseline power today.