It is interesting if they can finally make something of it. I've read news now that they've had luck using AI to figure out the correct set of containment parameters or something.

About heat, it takes about a hundred million degrees to jumpstart fusion of hydrogen isotopes into helium (and a wayward neutron), something that I believe is always achieved with a laser. But it should give off more heat / energy than you have to use with the laser to kickstart it.

If the process is sustained, it'll produce heat that can be used to warm a liquid like water so that it becomes easy to turn into electricity with a steam turbine.

Marie might be interested and knowledgable about this, being a physicist.

My comment was more of a quote from Steve Vai than an actual question. I'm clueless when it comes to physics.

Afaik limitless zero carbon fusion energy reactors would replace the ones used now, so the only change the end consumer would see is cost. The delivery system would still be the same.

I'm a theoretical physicist so I know very little about more practical things like these. I listened to a talk by a fusion reactor scientist once but I don't remember much of it except I think for various practical reasons there's a lot of energy loss, so only a small part of the generated energy can be used