re: #211 Coracle

Nuke startup costs are currently all up front.

Much solar is incremental, and large scale solar projects are not as unbalanced as you state. Plus, they pay back faster and on a longer term by being inexpendible.

If you’re talking photo-voltaic, they do have a lifespan.
20 years and you will likely be down 10-15% efficiency.

Not saying they aren’t a useful source, but there are factors to consider.