Virtual memory doesn't exist solely to support swap files. It also allows any program to assume it's the only thing running (which simplifies assembly code) an

Virtual memory doesn't exist solely to support swap files. It also allows any program to assume it's the only thing running (which simplifies assembly code) and enables memory-mapping of files and devices. (Yes, you'll still need to memory-map files when we have memristors. They still won't necessarily be contiguous on disk, and they still won't necessarily exist locally.)