You forget the applications this would have. Every fusion reactor we have, even ITER, would easily fit into an aircraft carrier. The W7-X can fit in a super-yac

You forget the applications this would have. Every fusion reactor we have, even ITER, would easily fit into an aircraft carrier. The W7-X can fit in a super-yacht sized vessel, and give it enough power to fly to the moon (not in a convenient/usable form, but certainly enough). And yeah, so can a nuclear reactor of course, but if it manages to blow up halfway it would poison half the earth. Yet fusion reactors are safe. What if we told NASA engineers they can use a gigawatt of power to drive ion engines? The applications of this kind of power go far beyond keeping apartments warm.