The problem is that there isn’t any ”base load” when you’ve introduced renewables.
Take a look at the South Australian grid for a peek into the future. How would you introduce a nuclear baseload to this grid? Turn it off for days on end when renewables deliver?
https://explore.openelectricity.org.au/energy/sa1/?range=7d&...
Also, consider that we have a connected grid outside of Texas and that the weather is not usually bad everywhere.