if you require a stable energy source, neither wind nor solar (nor both) provide a complete strategy. they can be a part of a composite strategy, though.

for both wind and solar, they're also quite taxing on the environment during manufacturing. the "true cost" is rarely reported.

nuclear energy has a different set of problems (including social / political ones). here's that industry's take on the economics of wind energy: https://www.ans.org/news/article-638/the-economics-of-wind-p...