There's no technical need to do that, because someone who can always deliver electricity would be able to struck contracts with those that always need it, i.e. heavy industry, esp. aluminum and chemistry. The reason why downregulation was necessary in the 2000s and 2010s was regulation ("Einspeisevorrang"), not technology.
If someone takes it near the power plant, and all the infrastructure is there for it. You don't build a (large) nuclear power plant just for these customers though. Generally, with a high amount of renewable but fluctuating supply, we have to get away from the base load model, towards a residual load model.