The graph in the article makes clear that isn't really true. Around half of coal use was replaced by natural gas in the 1990s, as you say. That's still a win

The graph in the article makes clear that isn't really true. Around half of coal use was replaced by natural gas in the 1990s, as you say. That's still a win - same energy, but half the CO2 emmisions. But since 2010 or so, the remainder of coal use was largely replaced by renewables. Now we just need to get rid of the remaining natural gas use. For electricity production, the trend here is pretty good. Natural gas won't disappear anytime soon, but there will be longer and longer periods where none is burned. But for home heating, I don't think gas will be phased out as fast as really needs to be done.