That article can also be read as a list of things that need to be fixed by the various postal systems.
We can issue addresses to computers, many of which cannot be considered to be in a fixed place, yet somehow we can't issue a permanent, unique address to something that's not likely to move around much.
Reminds me of a quote from a geocoding session at an OpenStreeMap conference. "Addresses are not a theoretically hard problem. The problem is that people don't follow standards, or have the same standard."
Trying to get everyone on the planet to massively change how they view the world is not easy.
Zip+4 was/is an attempt to get close to that, but not right up to it. I have no idea what my +4 is. In the two or three cases over many years that I actually had to fill it in (and cared enough to continue), I had to look on the USPS web site.
We can issue addresses to computers, many of which cannot be considered to be in a fixed place, yet somehow we can't issue a permanent, unique address to something that's not likely to move around much.