Now that’s just silly. Lots of things are more expensive than a nuclear reactor.

Grid-tied batteries are now about $300/kWh. Capitalized over 25 years, that adds 3.3 cents to peak (11AM) solar prices, which themselves can go negative at times (duck curve in action), and overall are 3-4 cents per kWh.

Nuclear (new) portends to cost between 7 and 20 cents per kWh according to Wikipedia.

Downvote me if you must, but the numbers are right there. Nuclear may have been the best option for a time, but that time has passed and is not coming back.