A look at history shows us that our energy sources have never remained static, with renewables such as wind and solar widespread several times in the past millennia, only to be displaced by a glut of cheap fuel.
Some sources become obsolete as their time has passed; others are taken over by their competitors as we are seeing with oil and coal.
The U.S. stopped the direct use of coal and oil for transportation and buildings in the 1920s and 1960s, respectively.