Prejudices(2)

NAT's drawbacks
NAT broke the end-to-end communication
Unfriendly to some applications (FTP, streaming)
Unfriendly to IPsec
A single point of failure (# of exit is 1)
NAT broke the bidirectional communication
Killing home networks
NAT does NOT provide MORE global IPv4 addresses
Killing automobiles and mobile telephones

NAT is a necessary evil
NAT enlarges the lifetime of IPv4
But NAT cannot solve the real problems