> And as the article points out, in a D-T reactor, you still need to produce tritium because it's basically not naturally occurring in a way that can be gathere

> And as the article points out, in a D-T reactor, you still need to produce tritium because it's basically not naturally occurring in a way that can be gathered. That means a fission breeder reactor. That fuel isn't free. It doesn't require a fission breeder reactor. All DT schemes imagine a blanket where they breed their own tritium, and produce enough to start additional DT reactors. Some imagine a startup phase where they run just on DD for a few months, with Q < 1, to make enough tritium to start up. If fission had to be used to make all the T then DT fusion would be a complete nonstarter economically.