Regarding (1), it's not that simple. It depends on what form fusion takes. Fission was once thought to be the future of energy generation, unlimited clean energ

Regarding (1), it's not that simple. It depends on what form fusion takes. Fission was once thought to be the future of energy generation, unlimited clean energy for all, but now we realize the (justified) regulatory, maintenance, safety, and build costs are so incredible it is usually more economical to build gas/coal plants or solar/wind. If we achieve fusion production in the form of modern tokamaks with insane regulatory, maintenance, and build costs similar or worse than fission, we will be in the same situation so the real goal is to achieve fusion without all of those added costs. Only then could fusion realize the result we all dream of and that seems unlikely for many decades. The best hope we have atm is one of the fusion startups working on alternative methods of fusion has a breakthrough. Some have made claims of breakthroughs and also claim net energy gain in a few years, but as history has taught us, that's unlikely to occur. As much as I want and hope for the unlimited, clean fusion energy we all dream of, the realist in me recognizes the challenges we face and that we probably still have a long way to go. In which case, it's probably good to put money in other efforts like geothermal and not put all our eggs in one basket.