Yeah, for grid energy applications in our lifetimes it's hard to see fusion beating a grid made up of solar, wind, lithium-ion and other battery chemistries, to

Yeah, for grid energy applications in our lifetimes it's hard to see fusion beating a grid made up of solar, wind, lithium-ion and other battery chemistries, topped up with some chemical storage (eg hydrogen) for places with cold winters. However, in the long term some kind of nuclear propulsion is the only realistic way to open up the outer solar system, and I'd prefer our descendents had a safer option than "nuclear pulse propulsion" - the physically plausible but very 1950s idea of pushing a spacecraft along with nuclear detonations...