There’s an even better target, x32, but sadly it never got much traction and is deprecated: https://en.wikipedia.org/wiki/X32_ABI https://en.wikipedia.org/wiki/

There’s an even better target, x32, but sadly it never got much traction and is deprecated: https://en.wikipedia.org/wiki/X32_ABI https://en.wikipedia.org/wiki/X32_ABI The idea is to expose the 64-bit instruction set and registers, but keep memory and pointers per-process 32-bit as most apps use less than 4 GB of memory.