The question of the mix is interesting, and probably more complex than it looks as we might have to take the "electrification" of industries, transportation, heating, etc. over time into consideration.

If EV become more popular, if trucks and trains start to use more electricity, if heat-pumps become more popular, etc. the demand for electricity would grow over what the country is currently using. So new capacity would be needed, and electricity would be even more critical and would require to be more reliable than ever before.

That is why nuclear has a part to play to make the grid stable and reliable, on top of renewable deployment.