Asklemmy

I really disagree about fusion. It will have nearly zero impact on the electricity and power market. It's dead on arrival economically. There's no way a fusion plant is going to be cheaper than a fission plant. And it's already far cheaper to provide base load power with solar and batteries than it is to do so via fission. And this is the state today. Imagine how cheap these will be when commercial fusion finally happens. Realistically, even for constant 24/7 power output, fusion will probably cost 3-5x what solar does. Fusion plants would have a smaller physical footprint, but no but no one really cares about that. There's no shortage of space to put panels.

Fusion will have a lot of utility in the very far future. As humanity ventures ever further outward, it will be invaluable for true deep space colonization. Fusion provides the power necessary to expand to the Outer Solar System and beyond. 500 years from now, fusion will be a really big deal to folks trying to make it out there. Fusion allows you to turn any random ice ball in the Kuiper belt into a colony capable of supporting millions. And it would probably be a necessary prerequisite for interstellar colonization.

But for anyone living closer to the Sun than the asteroid belt, fusion will be of little use beyond perhaps niche isotope synthesis or as a neutron source.