When people get excited about fusion as a source of energy, I’m always reminded of Henry Ford’s famous quote: “If I had asked people what they wanted, they would have said faster horses.” although apparently he probably never said that.

Fusion is that faster horse - promising a cheaper to operate firebox which when attached to a stream engine attached to an alternator can produce electricity.

This approach to generating electricity has been superseded by new technologies - first by gas turbines which removed the steam engine and then by wind turbines which removed heat from the process and now by solar PV which has removed all the mechanics.

I just can’t see any circumstances under which steam engines are “coming back” and becoming competitive for electricity no matter how cheap the firebox fuel is.