Perhaps we should stop running multiple programs on the same hardware at the same time while making sure information isn't leaked between domains? If the futur

Perhaps we should stop running multiple programs on the same hardware at the same time while making sure information isn't leaked between domains? If the future provides us with large but thermally limited dies, I could see a scenario where CPU components are duplicated but not all running at once. A thread or set of threads could own a hierarchy of caches, for example. Caches are die-intensive, so I don't see this happening soon, but maybe at some point in the future.