From the article:"The role for fusion would not be, “Oh, we’ve invented it. Let’s not bother building more wind turbines.” It would be, “We’ve invented it. Is this a better way than our alternative options to fill in the gaps and supply the last bit?”"

I think this is absolutely wrong. Limitless cheap energy will create unprecedented demand for new, previously wasteful ideas. Think about how energy availability made climate-controlled houses possible. Now try to imagine how future capitalists will sell us something previously unimaginable with a 10x or 100x energy supply.