A quick google search tells me that 30.1% of US energy generation comes from coal [1] (at least in 2017), with 62.7% coming from fossil fuels overall.
Unless you’re proposing switching to a ‘cleaner’ fossil fuel source, there’s only so much wind/solar/geothermal can contribute until we see major leaps in the available technologies. Until that time I will continue to view them as a supplemental power source, rather than a primary one.
[1]https://toxmap.nlm.nih.gov/toxmap/faq/2009/08/how-much-of-th...
If you look at Europe on the other hand coal is in rapid decline (9% decrease 2017-2018 for example[1]) with many countries now being coal free.
In the UK we measure coal free time in weeks now. I expect us to be coal free for good in only a couple of years.
In some countries this is a straight switch to renewables but but often I think it's a staged switch through natural gas.
1. https://sandbag.org.uk/wp-content/uploads/2019/01/The-Europe...
But hey, German energy production looks awesome from an environmental perspective!
[0] https://de.statista.com/statistik/daten/studie/153533/umfrag...
[1] https://i2.wp.com/adveco.co/wp-content/uploads/2019/06/EU-po...
In the shorter term, I think it's true enough. Germany and Japan (both wealthy, highly developed nations) have both increased consumption of coal in order to move away from nuclear. I won't argue that's what they will do in the longer term though.