Nobody is running on renewables. Well, there are some exceptions. Countries like Norway and Sweden have enough hydro that they do run on renewables. But ignoring those, nobody does.
Wind and solar pairs well with natural gas. Coming from a fossil fuel situation, wind and solar paired with gas have the big advantage that you get a reliable system, easy reduction of CO2 by adding more wind and solar. And it is cheap.
New nuclear is not cheap (compared to Russian gas).
Of course where this failed was in the gas part. Obviously, wind and solar need to be blamed for the lack of Russian gas. Same with Texas, when something goes wrong, blame renewables.
The obvious problem, for both renewables and for nuclear is cheap fossil fuel.
Expensive fossil fuel might make nuclear attractive.
Expensive fossil fuel will result in a focus on storage. But before that, most EU countries need a lot more wind and solar before they can focus on storage. There is no point in focusing on storage if output of renewables can't keep up with demand.
Maybe, a but if pumped hydro, some batteries, and power intensive industries running only when power is cheap?
(Not that nuclear wouldn't be nice, it's just never quick fix)
If you give me a lump of coal you give me power. If I burn that coal I get power.
Renewable energy is cheap. Renewable power isn't.
Nuclear energy is expensive. Nuclear power isn't.
You can't run a modern economy on renewables because you can't turn off society when the sun doesn't shine and the wind doesn't blow.
Europe is now learning this painful lesson.