Quit talking about what is being spent on fusion research. It has nothing to do with making nuclear power today. We spend billions on lot's of different types of research. Elon/SpaceX is building rockets that actually work for a fraction of what NASA was spending. He's so far ahead of everyone else it's stunning. Of course no good deed goes un-punished, Starship was delayed by the FAA and now by 'environmental review', probably take another year while they bleed money with the rocket sitting on the pad. Interesting as Boeing and Blue and the reset of the gang is struggling to get something that might actually make it to space. Interesting as Elon is no longer the "Green Energy" poster child once he started allowing others to speak.
We can build fusion plants today, and it shouldn't be costing billions. Nothing is perfect, build the damn plant.
Around 2015 post-Fukishima France decided it would cut it's nuclear power production in half. Pubilic opinion became anti-nuclear and they stopped routine maintenance (not like change the oil, like overhaul it because it's 30+ years old, think aircraft engine) because they were going to turn it off anyway. Again you create self-fulfilling prophesy. So they completely stopped building new plants, energy demand goes inexorably up. About 3-5 years in they shut down a few plants, and low and behold the electric rates started to skyrocket, as they had to buy demand from outside. At which point they (the French consumer) started to change their minds (actually scream loudly, I hinted to this earlier). Unfortunately they had stalled all the overhauls, because they were going to turn it all off, as it's foolish to spend money overhauling a plant your going to decommission, and they hadn't built anything new for an extended period due to all the hyped up fear of nuclear death by exploding power plants. So now we have to overhaul the plants we've ignored for the last 10 years and it's disruptive. Shocker! Makes good fodder for the Anti-Nuke press "See how expensive this is we have to shut down 1/2 our reactors to replace cracked pipes". No mention of the age of the plants or the fact that the maintenance was deferred for 10 years. Self-fulfilling.
Further, you make my earlier point. If we'd quit spending 1.6b/year on 'research' and start spending it on building and actual power plant. . .
Of course I keep forgetting that nobody has ever died mining coal, pumping oil, or in a refinery accident, from a de-railed rail car hauling volatiles, or falling off a windmill, or ... I keep forgetting how the environmental impact of the Exxon Valdez and BP disaster in the gulf is so much dramatically less than Fukishima, TMI, and Chernobyl. Yea, silly me.