Eh, not if involves using the equivalent of PAE. 40bit addressing in that requires applications to utilize a window to use memory. And pointers get invalidated

Eh, not if involves using the equivalent of PAE. 40bit addressing in that requires applications to utilize a window to use memory. And pointers get invalidated when the window is moved. Hurrah for CPU designers shoving immense workloads onto the software devs, especially application programmers.