The article fails to mention the elephant in the room: damage from high-speed neutrons.
From https://www.scientificamerican.com/article/can-small-fusion-...
Deuterium-tritium fusion releases most of its energy as high-speed neutrons, which damage steel parts and gradually turn them radioactive.
In contrast, much simpler Molten-salt-fueled reactors can burn current stock piles of spent fuel rods.
Safely generating electricity while reducing nuclear waste. References: