Solar energy + 3D printers sounds like a cool combination.
You could even begin home- or community-based manufacturing in the form of 3D printers. With cheap, decentralized energy, the possibilities are endless for large-scale distribution of wealth.
The only thing missing are tiny fission and fusion reactors to make every single element a possible material for 3D printer use.
Back in college, the professors liked talking about how there was a nuclear renaissance just around the corner. While they acknowledged that the capital costs of new reactors was high, government guaranteed loans and a new generation of smaller reactors were supposed to take care of that.
With that support, nuclear power was supposed to expand, due to favorable operating costs. But that does not seem to be the case, and it turns out reactors can’t compete on that front.
Natural gas is cheap, and solar is trending cheaper. Nuclear power is not traveling along the same path. It might be viable in some future (carbon pricing, a surge in energy demand, etc.), but not now.