Having worked in the industry, my gut feeling is that chipmakers don't invest all that much in looking for and preventing these sorts of attacks. When working

Having worked in the industry, my gut feeling is that chipmakers don't invest all that much in looking for and preventing these sorts of attacks. When working on a new feature, you are desperately trying to deliver on time something that adds value in the sorts of scenarios that it was designed for. And that is already hard enough.