With regulatory reform, nuke power would be more economically reasonable.
https://www.construction-physics.com/p/why-are-nuclear-power...
Regarding the staffing needs for operating a nuclear power plant, it requires a minimum of 0.7 people per MW for large-scale, multi-reactor facilities. While this is indeed more than solar, it is not a significant issue. For instance, France boasts some of the lowest electricity bills in Europe, and nuclear technology remains competitive today (no storage, more reliable, and competitive LCOE prices).
Moreover, Small Modular Reactors (SMRs) are being developed to significantly reduce staffing requirements, needing minimal to no maintenance.
https://www-pub.iaea.org/mtcd/publications/pdf/te_1193_prn.p...
But if you try that with radioactive power sources, the Department of Energy will shut you down.
2002: 2,256 MTOE
2012: 2,152 MTOE
2022: 2,182 MTOE
(MTOE = Tonne of oil equivalent)
Source: https://yearbook.enerdata.net/total-energy/world-consumption...
The dramatic comparative inefficiency of non-electric transport and heating makes this apparent paradox possible.
https://hn.algolia.com/?q=oklo (YC S14)
https://hn.algolia.com/?q=helion (YC S14)
I will say that one of the more interesting energy startups that I'm aware of (don't think it's YC though) is Terraform Industries which plans to make hydrocarbon fuels out of captured carbon powered via massive solar installations. I hope that that works out because they really do have a good mission and a plausible economic model to achieve it.
It's a different approach than most fusion reactors at least.
Something tech startups are fucking terrible at.