The flywheel design you linked was exactly what I was talking about. A system designed purely to add inertia to the grid, not ment for energy storage.

France was the nation alluded to that has run largely on nuclear for nearly half a century now.

I know what the newest generation of wind trubines are capable of, indeed I am going to local government meetings to try and keep Nimbys from blocking such a large scale development in my area. Thouse very consistent winds newer turbines are reliant on are only present in certain areas, which is why large projects have to be sited in thouse specific areas. You can’t just put a row of turbines wherever demand is and expect it to work.

Most toxic chemical waste by volume are things like heavy metals and such that will never, ever, break down. They are far more deadly to humans and animals than high level radioactive waste, which after a few centuries is more dangerous because of its toxicity than because of its radioactivity. Because of the danger and difficulty in safely storing such waste forever, production has also been largely outsourced to nations in Southeast Asia and Africa where environmental enforcement is corrupt and ineffectual if foreign lobbying can’t keep it from being written at all.

The waste produced is often stored in open unlined ponds which may at best and if the company went above and beyond have a clay or plastic liner to limit ingress into the local water table. This method has actually killed people, indeed it kills a lot of people every year, and will continue to pose a health hazard to the drinking water even if these nations take on the often billions of dollars per site in restoration and cleanup, which mostly involves moving this waste to a better designed enclosed pit like are used in richer nations because again, this waste will never be safe and can kill people in a million years just as easily as it does today.

Radioactive waste is well known among the public, but its far from the most dangerous kind of waste we make.