Re:Imagine the broadcast storms... (Score 1)

Huh? Wouldn't it be much better to make this at the beginning, like:
::fffe:0123:4567:89ab
Or better yet, use those the first two or three F's for subnet addresses.

I did not invent this "fffe-in-the-middle" thing out of thin air. I took it from IEEE's EUI-64 spec, which says that this is the 64-bit identifier corresponding to a given 48-bit MAC address.
Not every medium is ethernet, some have 64 bit node identifiers and you can't just truncate them without risk of duplicates. See RFC 2373, 2462, 2464 and references in the latter.

Let's get real here: 33 bits are enough to uniquely identify every single human in the world.

But you can't assign identifiers with perfect efficiency. See RFC 1715 for examples.