Comment Re:Don't say "NAT" (Score 1) 460
Those of us that have worked in medium or large networks know how difficult life can be with NAT. It is one thing to have the NAT between your internal network and internet, but something quite different when you have overlapping RFC1918 ranges within your network.
During the past 10 years company I work for has gone through 4 huge mergers and a lot of smaller ones and in every case there have been problem with overlapping address spaces. In those cases you first and foremost goal will be renumbering the conflicting address spaces and quite obviously this wouldn't be necessary if everybody will be using public addresses. During the last merger we renumbered 100k+ workstations, servers and phones.