Riffing on this, the amazing thing about diamond is not merely that it's a better conductor of heat, but that it's about 2.5 times higher than copper. The only

Riffing on this, the amazing thing about diamond is not merely that it's a better conductor of heat, but that it's about 2.5 times higher than copper. The only thing that beats it is single crystal boron arsenide which has some obvious downsides, being of course much more expensive and involving arsenic, which is considered a bad thing. And with that, diamond is destined to be even cheaper than silicon, I think. Much more available and easier to purify, the hard part is rendering it into a crystal which is relatively solved.