* Stephen John Smoogen:
When x86_64 splits into 48 bit memory path to some larger memory (60
bit I think is discussed) sometime in the future, we will probably
still call it x86_64 but build x86_64b packages.
This has already happened. You did not notice it because it did not
require x86_64b packages.
It's possible to hide most of the effect of the change by not handing
higher memory regions to userspace unless it requested it explicitly.
This is similar to how things are handled on ppc64le. aarch64 had a
similar transition, but opted for a hard break, if I recall correctly.
Thanks,
Florian