This is what oil-core cookware already does. But there's only so much "heat spreading" you can do before faster conductivity does basically nothing. The thermal

This is what oil-core cookware already does. But there's only so much "heat spreading" you can do before faster conductivity does basically nothing. The thermal conductivity of steel itself becomes the limiting factor pretty quickly. That said, if they can figure out vapor depositing diamond onto stainless steel, I'd take a diamond surface over an enamel surface. Provided they can figure out how to make it perfectly flat rather than so jagged at the molecular level that literally everything sticks to it. ("wouldn't that burn? It's just carbon after all": only if you give it the cast iron pan treatment and manage to have it sit on so much gas for so long that you get it up to 700C, which would make no sense)