despite 70 years of tinkering and trying it hasn't managed to make a noticeable dent in fossil fuel
Except for France which came up with the clever strategy of "not banning it", but that was apparently a mistake and they should have just used fossil fuels?
Now their nuclear operator is €50 billion in the negatives
€50 billion for several decades of clean energy seems like a pretty good deal.
If fossil fuel weren't massively subsided (impact the environment for free, wars with taxpayer money), Nuclear would have made a massive dent.
Producing the same with other sources will have a massive immediate impact on the land / environment.