Also it's 48-bit just on current amd64 chips, it's not an architectural amd64 property - your binary is compatible with >48bit VA space of the future (unless yo

Also it's 48-bit just on current amd64 chips, it's not an architectural amd64 property - your binary is compatible with >48bit VA space of the future (unless you yourself misguidedly bake the 48-bit assumption into it). But I guess the point was to point out lower bounds.