The only problem with that is that coal plants are increasingly priced out at midday and no alternative exists for overnight.
https://www.eia.gov/todayinenergy/detail.php?id=54919
Independently of its horrendous impact on the environment, more people die from coal mining accidents every year than in the entire history of nuclear power (yes, including Chernobyl).
FWIW, in the 4 years after this chart was produced, 5 more states flipped over from Coal to either Natural Gas or Wind. https://www.visualcapitalist.com/mapped-what-powers-each-u-s...