If, as seems likely, solar and wind come to totally dominate all new energy construction, then it seems like state/provincial and federal governments will need to either legally mandate / highly incentivize the construction of new baseload by utilities, or build those plants themselves. We have the TVA but as much as I hope, I don't think we're getting a bunch more federally owned and operated power companies in the US.
what are you going to construct the new baseload from? nothing comes close to the cheapness of pv and wind. grid-scale energy storage, in the form of batteries, is already too cheap for coal and nuclear to compete with it on that basis, and it's just going to get cheaper as we climb down the learning curve