The thing is, the fuel for fusion energy is available everywhere. The energy demand of a small town could be covered by only a few liters of deuterium a year, i

The thing is, the fuel for fusion energy is available everywhere. The energy demand of a small town could be covered by only a few liters of deuterium a year, if you can do it with hydrogen then the fuel cost of a fusion reactor is essentially 0 per kWh produced. The energy produced by a fusion reactor could be plentiful enough that we can build more fusion reactors at lower cost than before using that extra energy to save money (either by selling it or by using it to use more energy costly but faster and cheaper processes).