It has 32 addressing bits, and even if it did have 48 that wouldn't be enough. Inefficient allocation isn't the problem; there's just not enough address space f

It has 32 addressing bits, and even if it did have 48 that wouldn't be enough. Inefficient allocation isn't the problem; there's just not enough address space for the Internet at the scale it's reached. v6 is much easier (and cheaper) to deal with than layers and layers of NAT everywhere.