The current projections are that the switchover to primary renewables is going to happen in the lifetime of EVs manufactured today. For a slow to adapt industry such as our energy grids the drastic capital cost reductions (much less TCO advantages such as decreased fuel costs, decreased maintenance costs) of renewables (especially wind and solar, but some of those advances have had knock-on effects in mainstay hydro's TCO too) has made them take notice and they are adjusting much more rapidly than people assume. Entire countries have had 24 hour periods or more entirely running on renewables, and sure that's good weather, but that's still not something some people would have guessed ten years ago. Most of that isn't top-down government mandates, most of that is "ordinary" capitalism and the fact that power companies are realizing it's "easy money" to go for cheaper renewables as large portions of their energy mix. (To be fair, power companies have always worked that way. Even what most people think of as "coal states" have always been nearly as much hydro as coal since basically the beginning of electricity.)

Just about no one is building new nuclear into the mix right now, but that's a different can of worms, and at least for the moment with so many easy wins in sight to be had in solar/wind/improving existing hydro it may not even be necessary to add much or any nuclear.