I think you have it backwards, wind and solar are the stopgap.

Wind and solar require heavy mining of non-renewable, relatively rare resources that will likely run out in a couple generations. Solar panels and wind turbines have a short lifespan of a few decades, and we aren't good at recycling.

Look at the world leader in clean energy- China - and their long term plans. They are heavily invested in solar, for now, as a stopgap measure as they develop thorium reactor power and other related technologies.