Even if we can do sustained fusion, that doesn't make it a game changer. It looks like it will be hugely expensive. It's easy to say "fuel is nearly free and un

Even if we can do sustained fusion, that doesn't make it a game changer. It looks like it will be hugely expensive. It's easy to say "fuel is nearly free and unlimited!" but that's also true of solar power and solar is too expensive to take over the world's energy. Fusion would be worse because it would require more maintenance - such as frequently replacing radiation damaged parts.