Actually the Russians proved countries should keep their coal power plants ready to go.

https://www.dw.com/en/germany-reactivates-coal-fired-power-plant-to-save-gas/a-62893497

> The Heyden plant in Petershagen, near Hanover in northern Germany, is scheduled to return into service from August 29 until the end of April, operator Uniper said on Monday.

> With a capacity of 875 megawatts, Heyden is one of the most powerful coal-fired power plants in Germany. It started operation in 1987.

> Germany plans to phase out coal-fired power generation by 2038 at the latest. However, the war in Ukraine and the resulting disruptions to the energy market are causing some plants to be temporary reactivated.

Germany plans to keep coal as a backup for more than 15 years into the future.