It would be more accurate to say that it doesn't work for some of the allocations in a spreadsheet or word processor app. Which is why you still have the global

It would be more accurate to say that it doesn't work for some of the allocations in a spreadsheet or word processor app. Which is why you still have the global heap, but the point is that not everything needs to be on the same heap that has the same overall lifetime. That spreadsheet might still be running some algorithm that can do what it needs to do with a local heap. And that aside, there are still many apps that are more like "serve a web page". Most console apps are like that. Many daemons are, too.