Out of curiosity: 1. What software would you want to run that used 286-style segmentation in a 64 bit space? That model had been abandoned long before AMD wro

Out of curiosity: 1. What software would you want to run that used 286-style segmentation in a 64 bit space? That model had been abandoned long before AMD wrote the x86_64 spec. 2. What 386 protected mode (or unreal mode too, I guess) software are you needing to run such that you wouldn't buy a 64-bit-only CPU? Again, this has been entirely abandoned (with the sole exception of the SMP boot mechanism, which is defined to start in real mode) on modern systems, even at the firmware level.