It's hardly in dispute but it doesn't really detract from how limited IPv4 addressing is. There's only about 3.7 billion addresses available for the entire world.
This is in contrast to IPv6, where in the worst case, each organization would have a /64 and the entire world would have approximately a quintilian networks (2^(64-4), subtracting the /4 that the entire Internet is currently restricted to), each of which can support 18 quintilian hosts.. And that's worst case, even residential ISPs frequently give out /56s.
