Another big one is the default-to-safety nature of fusion vs. fission. With fission, if things go wrong, the nuclear process often speeds up and can run out of

Another big one is the default-to-safety nature of fusion vs. fission. With fission, if things go wrong, the nuclear process often speeds up and can run out of control. With fusion, generally when things go wrong temperatures dissipate and the fusion process halts naturally.