You don't need baseload. You need to always meet the demand. Nuclear can't do that either because it's too damn expensive. You'd never build a nuclear plant to

You don't need baseload. You need to always meet the demand. Nuclear can't do that either because it's too damn expensive. You'd never build a nuclear plant to fill in at peaks. What is needed in a future with lots of renewables is dispatchable sources, not nuclear plants with flat outputs. There are several options. All of them are currently too expensive so apart from hydro you don't see them in production scale anywhere, but as the renewables sector grows, these things will start to show up. This is not a joke - you can find people researching what it would take, and it's even within reach with today's tech - expensive of course, but not impossibly so. Currently, most countries seem to be reinforcing the power lines, as the cheapest option.