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As much as coal is bad for the environment, eliminating it completely isn't a great idea. It's one of the few sources of energy capable of a black start https:

• rootusrootus 5mo ago
  > It's one of the few sources of energy capable of a black start Doesn't hydropower count for like half of our black start capability? > Renewables generally aren't capable of a black start, wind turbines in particular use induction generators that require external power. Wind farms and PV both can use batteries to support black start capability.
• SAI_Peregrinus 5mo ago
  Batteries & solar (with sunlight) can black start if they have grid-forming inverters. Grid-following inverters are cheaper, but there's nothing physical or engineering-based that prevents using grid-forming inverters on enough renewable sources to black start when needed, just the economics of cheaper installations.