macos already has capabilities for compressing memory used by applications before finally giving up and paging it out. It seems plausible they could extend the

macos already has capabilities for compressing memory used by applications before finally giving up and paging it out. It seems plausible they could extend the code that supports that feature to push memory to external (or allocate it there in the first place if utilization isn't expected to be hot), and only pull it back after utilization indicates there is a benefit.