Another thing fusion reactors would be good for is “burning” high radioactivity fission waste.

…Keeping such waste in a hole isn’t that expensive, so maybe the economic viability is questionable, but still. Fusion is great sources of very high temperature neutrons for anything that needs it.

That being said, I’m skeptical of all the other stuff needed to make it practical. Like, say, the extreme neutron flux making all that incredible expensive containment equipment radioactive.