What's interesting is that for isotope production, fusion reactors are already the most economical option. You don't even need to collect any energy back, if the goal is to produce isotopes.
It also means that many nation states, companies or even wealthy individuals can afford access to such isotope production, including for nuclear weapons.
It's funny, because 40 years ago 'they won't be usable to create weapons with, so they could be built all over the world' was one of the selling points of fusion development; it was always obvious as a falsehood though, since any neutron source can be used to produce weapons grade isotopes given the motivation, even medical reactors that are already widespread.
