I regarded these
When I saw one at Sears back in the early part of this century as further proof that American manufacturers had totally gone off the deep end.
Just like the pregnant hippopotamuses which pickup trucks mutated into, or the HUMMER as a family car, these ranges were the last fevered excess of a totally obscene culture of: Because I can, I will.
I asked the salesman (back then, Sears actually still had salespeople who knew their wares, imagine that) how well it worked. He said, quite well - the heavily insulated self-cleaning oven coupled with the all metal construction meant that the system could cool fast and keep cool easily.
He also said it was the stupidest idea that he'd ever seen and not one single unit in their entire sales district had moved, nor did he expect that they would.
You can get the same effect by putting an oven-proof casserole in a larger, also oven proof casserole which has a centimeter of ice frozen in it. The ice will keep the food cool and the slight additional moisture during the first part of baking won't matter to most baked items.