Well demand isn’t going to go down, and we’re going to have to replace all of the old power plants anyways, even if they are solar or wind. Everything that we build has a lifespan, and the United States has a heck of a lot of legacy power plants that are going to be decommissioned over the next 100 years regardless of what type of plants these are. Solar, wind, hydro, coal, gas, nuclear… Nothing lasts forever.