> solution is to diversify renewable energy sources

There are two economically-viable renewable sources: solar and wind. Everything else is, to put it succinctly, bullshit.

We're not producing and deploying as much solar and wind as we can. But global production has limits. Going all in on just those two (together with batteries) requires massively overpaying. That, in turn, makes the economy uncompetitive.

> Nuclear takes to long to plan and build. If that is fixed, then great

Permitting takes forever, too. Nuclear can be done quicker and cheaper, we've seen China do that. It's a good part of the mix because we just need to add power, and ideally, with economies of scale.