Sadly, I think fusion for commercial electricity is dead as a doornail. Beyond the hurdle of getting it to be energy positive is something called cost.... Fission reactors 'worked the first time' using a design done by some (v smart) folks basically with pencil and paper. And while we have a fleet of them working now (sunk cost), the unsubsidized, amortized cost per kWh has IMO not been compelling computed anywhere I have seen. The estimates I have seen come in above wind and often above solar PV! In contrast, imagine they get a fusion plant to be energy positive tomorrow after 60 YEARS of 'almost theres', and spending 10 billion dollars on a (huge) demo scale plant. We're going to somehow manage to take that technical monster, scale it up to the GW scale, do all the engineering so it can run for 30-50 years and multiply that 1000x fold and the result will be juice at an amortized cost of $0.15/kWh?? Really? ON the bright side...I guess its a heckuva jobs program. I guess that for fission, I think the cost and safety concerns can be allayed by a 'standard design' or a family of them, using modern metallurgical and modeling know-how. The waste issue in my opinion can be handled by the existing pools til the daughters decay, then dry casks. Not rocket science. If folks in 1000 years want to move/bury the dry casks, they can, in the meantime they don't take up a lot of space (compared to the amount of real estate available on earth, or say, a single big strip mine). As I said before, I think the jury is still out on fuel breeding and reprocessing and thorium. The costs for a single pass U reactor are marginal, and reprocessing is very difficult/expensive. Hmmm. Beside costs, there is still the issue of duty cycle. Ironically, if all your generators ran at constant output all the time, that is also a problem for grid management. The existing fleet of N reactors don't throttle well if at all, whereas demand has daily and seasonal cycles. I got my juice at a 50% discount in the winter (up until last year) because my utility had a lot of N plants that exceeded demand in the winter. All those pumped hydro storage facilities that folks want to store wind and solar....go check...most of the existing ones were built to store nighttime power from N-plants! So, a grid based solely on solar/wind and nuclear is not manageable with current technology (no storage)! Dispatchable hydro and geothermal might help, but seldom are all these resources located in the same region. A future decarbonized energy system will still need massive energy storage even with all the N-plants you want. Or N-plants with new designs that can be throttled on something like a diurnal cycle. Or both. Lest you think I am too negative...I'm not. Storage and distributed load management 'smart grid' technology might, worst case, double the price of a kWh. And that is not the end of civilization.